Shallow Thoughts : tags : python

12:33 Nov 15, 2024 More mapping | permalink to this entry | · ebook-convert

# Initialize the ADC
i2c = busio.I2C(board.SCL, board.SDA)
ads = ADS.ADS1015(i2c)
adc0 = AnalogIn(ads, ADS.P0)

# Read a value
value = adc0.value
voltage = adc0.voltage

GPIO.setmode(GPIO.BCM)
GPIO.setup(23, GPIO.OUT)
pump = GPIO.PWM(PUMP_PIN, 50)
pump.start(0)

# Run the motor at 30% for 2 seconds, then stop.
pump.ChangeDutyCycle(30)
time.sleep(2)
pump.ChangeDutyCycle(0)

function newquote() {
    // ... resizing and other slow stuff here

    setTimeout(newquote, 30000);
}

// Display the first page:
newquote();

<h1>innerHTML Leak</h1>

<p id="thecontent">
</p>

<script type="text/javascript">
var i = 0;
function changeContent() {
    var s = "Now we're at number " + i;
    document.getElementById("thecontent").innerHTML = s;
    i += 1;

    setTimeout(changeContent, 2000);
}

changeContent();
</script>

    userbills = user.get_bills()    # this does a read query

    # Do some slow operations that don't involve the database at all
    for bill in userbills:
        slow_update_involving_web_scraping(bill)

    # Now bills are all updated; add and commit them.
    # Here's where the write operations start.
    for bill in userbills:
        db.session.add(bill)
    db.session.commit()

$ sudo su - postgres
$ psql

CREATE USER myflaskuser WITH PASSWORD 'password';
ALTER ROLE myflaskuser SET client_encoding TO 'utf8';
ALTER ROLE myflaskuser SET default_transaction_isolation TO 'read committed';
ALTER ROLE myflaskuser SET timezone TO 'UTC';

CREATE DATABASE dbname;
GRANT ALL PRIVILEGES ON DATABASE dbname TO myflaskuser;

load database
    from 'latest-sqlite-file.db'
    into postgresql:///new_db_name

with include drop, quote identifiers, create tables, create indexes, reset sequences

set work_mem to '16MB', maintenance_work_mem to '512 MB';

host  all     all   0.0.0.0/0     md5
host  all     all   ::/0          md5

listen_addresses = '*'

service postgresql restart

    into postgresql://username:password@host/dbname

pgloader migrate.pgloader

CREATE SEQUENCE user_id_seq OWNED by "user".id;
ALTER TABLE "user" ALTER COLUMN id SET default nextval('user_id_seq');
SELECT setval(pg_get_serial_sequence('user', 'id'), coalesce(max(id)+1,1), false) FROM "user";

    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \
        'sqlite:///' + os.path.join(basedir, 'dbname.db')

    with open(backup_file, 'w') as fp:
        subprocess.call(["pg_dump", dbname], stdout=fp)

ogr2ogr -t_srs EPSG:4326 -f GeoJSON file.json file.shp

def shapefile2geojson(infile, outfile, fieldname):
    '''Translate a shapefile to GEOJSON.'''
    options = gdal.VectorTranslateOptions(format="GeoJSON",
                                          dstSRS="EPSG:4326")
    gdal.VectorTranslate(outfile, infile, options=options)

folium.GeoJson(jsonfile, style_function=style_fcn).add_to(m)

import random

def random_html_color():
    r = random.randint(0,256)
    g = random.randint(0,256)
    b = random.randint(0,256)
    return '#%02x%02x%02x' % (r, g, b)

def style_fcn(x):
    return { 'fillColor': random_html_color() }

def highlight_fcn(x):
    return { 'fillColor': '#ff0000' }

tooltip = folium.GeoJsonTooltip(fields=['NAME'])

$ jq . House.json | less
{
  "type": "FeatureCollection",
  "name": "cb_2018_35_sldl_500k",
  "crs": {
    "type": "name",
    "properties": {
      "name": "urn:ogc:def:crs:OGC:1.3:CRS84"
    }
  },
  "features": [
    {
      "type": "Feature",
      "properties": {
        "STATEFP": "35",
        "SLDLST": "009",
        "AFFGEOID": "620L600US35009",
        "GEOID": "35009",
        "NAME": "9",
        "LSAD": "LL",
        "LSY": "2018",
        "ALAND": 3405159792,
        "AWATER": 5020507
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
...

import random

def hypermoon(filename, nwords=4):
    '''Return a silly moon name with nwords words,
       each taken from a word list in the given filename.
    '''
    fp = open(filename)
    lines = fp.readlines()

    # A list to store the words to describe the moon:
    words = []
    for i in range(nwords):    # This will be run nwords times
        # Pick a random number between 0 and the number of lines in the file:
        whichline = random.randint(0, len(lines))

        # readlines() includes whitespace like newline characters.
        # Use whichline to pull one line from the file, and use
        # strip() to remove any extra whitespace:
        word = lines[whichline].strip()

        # Append it to our word list:
        words.append(word)

    # The last word in the phrase will be "moon", e.g.
    # super blood wolf black pancreas moon
    words.append("moon")

    # ' '.join(list) combines all the words with spaces between them
    return ' '.join(words)

# This is called when the program runs:
if __name__ == '__main__':
    random.seed()

    print(hypermoon('/usr/share/dict/words', 4))

def hypermoon(filename, nwords=4):
    with open(filename, encoding='utf-8') as fp:
        lines = fp.readlines()

    words = [ lines[random.randint(0, len(lines))].strip()
              for i in range(nwords) ]
    words.append('moon')
    return ' '.join(words)

wget -O mountains.tif 'http://opentopo.sdsc.edu/otr/getdem?demtype=SRTMGL3&west=-106.8&south=35.1&east=-105.0&north=36.5&outputFormat=GTiff'

gdaldem hillshade mountains.tif hillshade.png
pho hillshade.png

>>> import gdal
>>> import numpy as np

>>> demdata = gdal.Open('mountains.tif')
>>> demarray = np.array(demdata.GetRasterBand(1).ReadAsArray())
>>> demarray.min(), demarray.max()
(1501, 3974)
>>> print([ x * 3.2808399 for x in (demarray.min(), demarray.max())])
[4924.5406899, 13038.057762600001]

>>> np.where(demarray == demarray.max())
(array([645]), array([1386]))
>>> np.where(demarray == demarray.min())
(array([1667]), array([175]))

>>> demarray.shape
(1680, 2160)

>>> import affine
>>> affine_transform = affine.Affine.from_gdal(*demdata.GetGeoTransform())
>>> inverse_transform = ~affine_transform
>>> [ round(f) for f in inverse_transform * (-106.1803, 35.827) ]
[744, 808]

>>> demarray[808, 744], demarray[808, 744] * 3.28
(1878, 6159.839999999999)

gdal_translate -ot UInt16 -of PNG mountains.tif mountains.png

    location <rightward, upward, forward>

    location <.3444, 0.0287, .481>

    location <.3444, 0.033, .481>
    look_at <.5, 0.033, 1>

light_source { <2, 1, -1> color <1,1,1> }

camera {
    location <.3444, 0.0330, .481>
    look_at <.5, 0.0287, 1>
}

light_source { <2, 1, -1> color <1,1,1> }

height_field {
    png "mountains.png"
    smooth
    pigment {
        gradient y
        color_map {
            [ 0 color <.7 .7 .7> ]
            [ 1 color <1 1 1> ]
        }
    }
    scale <1, 1, 1>
}

povray +A +W800 +H600 +INAME_OF_POV_FILE +OOUTPUT_PNG_FILE

gdaldem hillshade n35_w107_1arc_v3.tif hillshade.png

gdal_translate -ot UInt16 -of PNG srtm_54_07.tif srtm_54_07.png

import gdal
import numpy as np

demdata = gdal.Open(filename)
demarray = np.array(demdata.GetRasterBand(1).ReadAsArray())
print(demarray.min(), demarray.max())

indices = np.where(demarray == demarray.max())
ymax, xmax = indices[0][0], indices[1][0]
print("The highest point is", demarray[ymax][xmax])
print("  at pixel location", xmax, ymax)

import affine

affine_transform = affine.Affine.from_gdal(*demdata.GetGeoTransform())
lon, lat = affine_transform * (xmax, ymax)

inverse_transform = ~affine_transform
px, py = [ round(f) for f in inverse_transform * (lon, lat) ]

    css = '* { background-color: #f00; }'
    css_provider = gtk.CssProvider()
    css_provider.load_from_data(css)
    context = gtk.StyleContext()
    screen = Gdk.Screen.get_default()
    context.add_provider_for_screen(screen, css_provider,
                                    gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)

    css = 'button { background-color: #f00; }'

    button_context = button.get_style_context()
    button_context.add_class("whitebutton")

    button_context = button.get_style_context()
    entry_style_context.remove_class("red")

    label = gtk.Label()
    label.set_use_markup(True)
    label.set_line_wrap(True)
    label.set_name("red_label")
    mainbox.pack_start(label, False, False, 0)
    css = '#red_label { background-color: #f00; }'
[ ... ]

.button { border-radius: 15; border-width: 2; border-style: outset; }
.button:hover { background: #dff; border-color: #8bb; }

    buttonbox = gtk.ButtonBox(spacing=4)
    buttonbox.set_name("buttonbox")
    mainbox.pack_end(buttonbox, False, False, 0)

    btn = gtk.Button(label="A")
    buttonbox.add(btn)

    btn = gtk.Button(label="B")
    buttonbox.add(btn)

#buttonbox button { color: red; }

label.set_label('Headline'
                'Normal text')

def hoglist(delay=5):
    '''Return a list of processes using a nonzero CPU percentage
       during the interval specified by delay (seconds),
       sorted so the biggest hog is first.
    '''
    proccesses = list(psutil.process_iter())
    for proc in proccesses:
        proc.cpu_percent(None)    # non-blocking; throw away first bogus value

    print("Sleeping ...")
    sys.stdout.flush()
    time.sleep(delay)
    print()

    procs = []
    for proc in proccesses:
        percent = proc.cpu_percent(None)
        if percent:
            procs.append((proc.name(), percent))

    print(procs)
    procs.sort(key=lambda x: x[1], reverse=True)
    return procs

if __name__ == '__main__':
    prohogscs = hoglist()
    for p in hogs:
        print("%20s: %5.2f" % p)

"area": "75/-20/10/60",

import netCDF4

data = netCDF4.Dataset('filename.nc')

>>> for key in data.variables:
...   print(key)
... 
longitude
latitude
level
time
w
vo
u
v

>>> data['level']
<class 'netCDF4._netCDF4.Variable'>
int32 level(level)
    units: millibars
    long_name: pressure_level
unlimited dimensions: 
current shape = (3,)
filling on, default _FillValue of -2147483647 used

>>> data['level'][:]
array([ 250,  775, 1000], dtype=int32)

>>> type(data['level'][:])
<class 'numpy.ndarray'>

>>> data['u']
<class 'netCDF4._netCDF4.Variable'>
int16 u(time, level, latitude, longitude)
    scale_factor: 0.002161405503194121
    add_offset: 30.095301438361684
    _FillValue: -32767
    missing_value: -32767
    units: m s**-1
    long_name: U component of wind
    standard_name: eastward_wind
unlimited dimensions: time
current shape = (30, 3, 241, 480)
filling on

>>> data['time'].shape
(30,)

>>> data['longitude'].shape
(480,)
>>> data['latitude'].shape
(241,)

>>> for key in data.variables:
...   print(key, data[key].shape)

    timeunits = JSdata.data['time'].units
    cal = JSdata.data['time'].calendar
    for i, t in enumerate(JSdata.data['time']):
        thedate = netCDF4.num2date(t, units=timeunits, calendar=cal)

cd outdir
mkdir moviedir

i=1
for fil in *.png; do
  newname=$(printf "%04d.png" $i)
  ln -s ../$fil moviedir/$newname
  i=$((i+1))
done

ffmpeg -i moviedir/%4d.png -filter:v "setpts=2.5*PTS" -pix_fmt yuv420p jetstream.mp4

    document = Poppler.Document.load(filename)
    document.setRenderHint(Poppler.Document.TextAntialiasing)
    page = document.page(pageno)
    img = self.page.renderToImage(dpi, dpi)

    # Use the rendered image as the pixmap for a label:
    pixmap = QPixmap.fromImage(img)
    label.setPixmap(pixmap)

    size = page.pageSize()

        # Create self.img once, early on:
        self.img = self.page.renderToImage(self.dpi, self.dpi)

    def paintEvent(self, event):
        qp = QPainter()
        qp.begin(self)
        qp.drawImage(QPoint(0, 0), self.img)
        qp.end()

DEVICE = 0x20 # Device address (A0-A2)
IODIRA = 0x00 # Pin direction register
OLATA  = 0x14 # Register for outputs
GPIOA  = 0x12 # Register for inputs

# Set all GPA pins as outputs by setting
# all bits of IODIRA register to 0
bus.write_byte_data(DEVICE,IODIRA,0x00)

# Set output all 7 output bits to 0
bus.write_byte_data(DEVICE,OLATA,0)

bus.write_byte_data(DEVICE, IODIRA, 0x00)

bus.write_byte_data(DEVICE, IODIRA, 0x1F)

bus.write_byte_data(DEVICE, OLATA, MyData)

OLATB  = 0x15
bus.write_byte_data(DEVICE, OLATB, MyData)

GPIOB  = 0x13
val = bus.read_byte_data(DEVICE, GPIOB)

GPPUA  = 0x0c    # Pullup resistor on GPA
GPPUB  = 0x0d    # Pullup resistor on GPB
bus.write_byte_data(DEVICE, GPPUB, inmaskB)

pin_base = 65
i2c_addr = 0x20

wiringpi.wiringPiSetup()
wiringpi.mcp23017Setup(pin_base, i2c_addr)

wiringpi.pinMode(pin_base, wiringpi.OUTPUT)
wiringpi.pinMode(input_pin, wiringpi.INPUT)

wiringpi.digitalWrite(pin_no, 1)
val = wiringpi.digitalRead(pin_no)

wiringpi.pullUpDnControl(input_pin, 2)

import RPi.GPIO as GPIO
import time

button_pin = 18

GPIO.setmode(GPIO.BCM)

GPIO.setup(button_pin, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)

try:
    while True:
        if GPIO.input(button_pin):
            print("ON")
        else:
            print("OFF")

        time.sleep(1)

except KeyboardInterrupt:
    print("Cleaning up")
    GPIO.cleanup()

import RPi.GPIO as GPIO
import time

def button_handler(pin):
    print("pin %s's value is %s" % (pin, GPIO.input(pin)))

if __name__ == '__main__':
    button_pin = 18

    GPIO.setmode(GPIO.BCM)

    GPIO.setup(button_pin, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)

    # events can be GPIO.RISING, GPIO.FALLING, or GPIO.BOTH
    GPIO.add_event_detect(button_pin, GPIO.BOTH,
                          callback=button_handler,
                          bouncetime=300)

    try:
        time.sleep(1000)
    except KeyboardInterrupt:
        GPIO.cleanup()

def button_handler(pin):
    time.sleep(.01)    # Wait a while for the pin to settle
    print("pin %s's value is %s" % (pin, GPIO.input(pin)))

    GPIO.add_event_detect(button_pin, GPIO.RISING, callback=button_on,
                          bouncetime=bouncetime)
    GPIO.add_event_detect(button_pin, GPIO.FALLING, callback=button_off,
                          bouncetime=bouncetime)

import Tkinter
from RPi import GPIO
import time

class ButtonWindow:
    def __init__(self, button_pin):
        self.tkroot = Tkinter.Tk()
        self.tkroot.geometry("100x60")

        self.label = Tkinter.Label(self.tkroot, text="????",
                                   bg="black", fg="white")
        self.label.pack(padx=5, pady=10, side=Tkinter.LEFT)

        self.button_pin = button_pin
        GPIO.setmode(GPIO.BCM)

        GPIO.setup(self.button_pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

        GPIO.add_event_detect(self.button_pin, GPIO.BOTH,
                              callback=self.button_handler,
                              bouncetime=300)

    def button_handler(self, channel):
        time.sleep(.01)
        if GPIO.input(channel):
            self.label.config(text="ON")
            self.label.configure(bg="red")
        else:
            self.label.config(text="OFF")
            self.label.configure(bg="blue")

if __name__ == '__main__':
    win = ButtonWindow(18)
    win.tkroot.mainloop()

surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, *imagesize)

cr = cairo.Context(surface)

    def draw(self, widget, ctx):

    def draw(self, widget, ctx, background=None):

   def save_image(self, outfile):
        dst_surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
                                         self.width, self.height)

        dst_ctx = cairo.Context(dst_surface)

        # draw() will overwrite self.ctx, so save it first:
        save_ctx = self.ctx

        # Draw everything again to the new context,
        # with a transparent instead of an opaque background:
        self.draw(None, dst_ctx, (0, 0, 1, 0))  # transparent blue

        # Restore the GUI context:
        self.ctx = save_ctx

        dst_surface.write_to_png("example.png")
        print("Saved to", outfile)

allgit() {
    pushd ~
    foreach repo ($myrepos)
        echo $repo :
        cd ~/src/$repo
        git pull
    end
    popd
}

  localbranches=("${(@f)$(git branch | sed 's/..//')}")
  remotebranches=("${(@f)$(git branch -a | grep remotes | grep -v HEAD | grep -v master | sed 's_remotes/origin/__' | sed 's/..//')}")

from git import Repo
repo = Repo('.')

    output = repo.git.status(porcelain=True)

    foreachref = repo.git.execute(['git', 'for-each-ref',
                                   '--format="%(refname:short) %(push:track)"',
                                   'refs/heads'])

    for i, entry in enumerate(reversed(ref.log())):
        for j, upstream_entry in enumerate(reversed(upstream.log())):
            if entry.newhexsha == upstream_entry.newhexsha:
                return i, j

repo.git.checkout(remotebranchname, b=name)

>>> from PyQt5.QtWebEngineWidgets import QWebEngineView
>>> help(QWebEngineView)

python -c "from sys import exit; help(exit)"

#############################################################
# Python help functions. Get help on a Python class in a
# format that can be piped through grep, redirected to a file, etc.
# Usage: pythonhelp [module.]class [module.]class ...
pythonXhelp() {
    python=$1
    shift
    for f in $*; do
        if [[ $f =~ '.*\..*' ]]; then
            module=$f:r
            obj=$f:e
            s="from ${module} import ${obj}; help($obj)"
        else
            module=''
            obj=$f
            s="help($obj)"
        fi
        $python -c $s
    done
}
alias pythonhelp="pythonXhelp python"
alias python2help="pythonXhelp python2"
alias python3help="pythonXhelp python3"

python3help PyQt5.QtWebEngineWidgets.QWebEngineView | grep PYQT_SIGNAL

    self.set_opacity(.5)

    if (!XShapeQueryExtension(dpy, &shape_event_base, &shape_error_base)) {
        printf("No SHAPE extension\n");
        return;
    }

    /* Make a shaped window, a rectangle smaller than the total
     * size of the window. The rest will be transparent.
     */
    region = CreateRegion(outerBound, outerBound,
                          XWinSize-outerBound*2, YWinSize-outerBound*2);
    XShapeCombineRegion(dpy, win, ShapeBounding, 0, 0, region, ShapeSet);
    XDestroyRegion(region);

    /* Make a frame region.
     * So in the outer frame, we get input, but inside it, it passes through.
     */
    region = CreateFrameRegion(innerBound);
    XShapeCombineRegion(dpy, win, ShapeInput, 0, 0, region, ShapeSet);
    XDestroyRegion(region);

Region CreateRegion(int x, int y, int w, int h) {
    Region region = XCreateRegion();
    XRectangle rectangle;
    rectangle.x = x;
    rectangle.y = y;
    rectangle.width = w;
    rectangle.height = h;
    XUnionRectWithRegion(&rectangle, region, region);

    return region;
}

    if self.is_composited():
        region = gtk.gdk.region_rectangle(gtk.gdk.Rectangle(0, 0, 1, 1))
        self.window.input_shape_combine_region(region, 0, 0)

    # Warning: untested code!
    bitmap = gtk.gdk.Pixmap(None, self.width, self.height, 1)
    cr = bitmap.cairo_create()
    # Draw a white circle in a black rect:
    cr.rectangle(0, 0, self.width, self.height)
    cr.set_operator(cairo.OPERATOR_CLEAR)
    cr.fill();

    # draw white filled circle
    cr.arc(self.width / 2, self.height / 2, self.width / 4,
           0, 2 * math.pi);
    cr.set_operator(cairo.OPERATOR_OVER);
    cr.fill();

    self.window.input_shape_combine_mask(bitmap, 0, 0)

fcntl.fcntl(fd, fcntl.F_SETFL, oldflags | os.O_NONBLOCK)

import sys, os
import termios, fcntl
import select

fd = sys.stdin.fileno()
newattr = termios.tcgetattr(fd)
newattr[3] = newattr[3] & ~termios.ICANON
newattr[3] = newattr[3] & ~termios.ECHO
termios.tcsetattr(fd, termios.TCSANOW, newattr)

oldterm = termios.tcgetattr(fd)
oldflags = fcntl.fcntl(fd, fcntl.F_GETFL)
fcntl.fcntl(fd, fcntl.F_SETFL, oldflags | os.O_NONBLOCK)

print "Type some stuff"
while True:
    inp, outp, err = select.select([sys.stdin], [], [])
    c = sys.stdin.read()
    if c == 'q':
        break
    print "-", c

# Reset the terminal:
termios.tcsetattr(fd, termios.TCSAFLUSH, oldterm)
fcntl.fcntl(fd, fcntl.F_SETFL, oldflags)

from mpl_toolkits.basemap import Basemap
import matplotlib.pyplot as plt

def draw_us_map():
    # Set the lower left and upper right limits of the bounding box:
    lllon = -119
    urlon = -64
    lllat = 22.0
    urlat = 50.5
    # and calculate a centerpoint, needed for the projection:
    centerlon = float(lllon + urlon) / 2.0
    centerlat = float(lllat + urlat) / 2.0

    m = Basemap(resolution='i',  # crude, low, intermediate, high, full
                llcrnrlon = lllon, urcrnrlon = urlon,
                lon_0 = centerlon,
                llcrnrlat = lllat, urcrnrlat = urlat,
                lat_0 = centerlat,
                projection='tmerc')

    # Read state boundaries.
    shp_info = m.readshapefile('st99_d00', 'states',
                               drawbounds=True, color='lightgrey')

    # Read county boundaries
    shp_info = m.readshapefile('cb_2015_us_county_500k',
                               'counties',
                               drawbounds=True)

if __name__ == "__main__":
    draw_us_map()
    plt.title('US Counties')
    # Get rid of some of the extraneous whitespace matplotlib loves to use.
    plt.tight_layout(pad=0, w_pad=0, h_pad=0)
    plt.show()

    MAXSTATEFP = 73
    states = [None] * MAXSTATEFP
    for state in m.states_info:
        statefp = int(state["STATE"])
        # Many states have multiple entries in m.states (because of islands).
        # Only add it once.
        if not states[statefp]:
            states[statefp] = state["NAME"]

    fp = open("tidy_data.csv")
    reader = csv.DictReader(fp)

    # Make a dictionary of all "county, state" and their colors.
    county_colors = {}
    for county in reader:
        # What color is this county?
        pop = float(county["votes"])
        blue = float(county["results.clintonh"])/pop
        red = float(county["Total.Population"])/pop
        county_colors["%s, %s" % (county["name"], county["State"])] \
            = (red, 0, blue)

def fuzzy_find(s, slist):
    '''Try to find a fuzzy match for s in slist.
    '''
    best_ratio = -1
    best_match = None

    ls = s.lower()
    for ss in slist:
        r = SequenceMatcher(None, ls, ss.lower()).ratio()
        if r > best_ratio:
            best_ratio = r
            best_match = ss
    if best_ratio > .75:
        return best_match
    return None

    for i, county in enumerate(m.counties_info):
        countyname = county["NAME"]
        try:
            statename = states[int(county["STATEFP"])]
        except IndexError:
            print countyname, "has out-of-index statefp of", county["STATEFP"]
            continue

        countystate = "%s, %s" % (countyname, statename)
        try:
            ccolor = county_colors[countystate]
        except KeyError:
            # No exact match; try for a fuzzy match
            fuzzyname = fuzzy_find(countystate, county_colors.keys())
            if fuzzyname:
                ccolor = county_colors[fuzzyname]
                county_colors[countystate] = ccolor
            else:
                print "No match for", countystate
                continue

        countyseg = m.counties[i]
        poly = Polygon(countyseg, facecolor=ccolor)  # edgecolor="white"
        ax.add_patch(poly)

    countyseg = m.counties[i]
    if statename == 'Hawaii':
        countyseg = list(map(lambda (x,y): (x + 5750000, y-1400000), countyseg))
    poly = Polygon(countyseg, facecolor=countycolor)
    ax.add_patch(poly)

virtualenv --system-site-packages $HOME/.pythonenv

VIRTUAL_ENV_DISABLE_PROMPT=1 source $HOME/.pythonenv/bin/activate

mkdir ~/bin/python
ln -s ~/src/metapho/metapho ~/bin/python/

export PYTHONPATH=$HOME/bin/python

from setuptools import Command

class CleanCommand(Command):
    """Custom clean command to tidy up the project root."""
    user_options = []
    def initialize_options(self):
        pass
    def finalize_options(self):
        pass
    def run(self):
        os.system('rm -vrf ./build ./dist ./*.pyc ./*.tgz ./*.egg-info ./docs/sphinxdoc/_build')

      cmdclass={
          'clean': CleanCommand,
      }

python setup.py clean

def get_version():
    '''Read the pytopo module versions from pytopo/__init__.py'''
    with open("pytopo/__init__.py") as fp:
        for line in fp:
            line = line.strip()
            if line.startswith("__version__"):
                parts = line.split("=")
                if len(parts) > 1:
                    return parts[1].strip()

      version=get_version(),

# Utility function to read the README file.
# Used for the long_description.
def read(fname):
    return open(os.path.join(os.path.dirname(__file__), fname)).read()

    long_description=read('README'),

virtualenv venv
source venv/bin/activate

********************************************************************
* Building PyGTK using distutils is only supported on windows. *
* To build PyGTK in a supported way, read the INSTALL file.    *
********************************************************************

virtualenv --system-site-packages venv
source venv/bin/activate

download_url='https://github.com/user/package/tarball/tagname',

git tag 0.1 -m "Name for this tag"
git push --tags origin master

[distutils]
index-servers =
  pypi
  pypitest

[pypi]
repository=https://pypi.python.org/pypi
username=YOUR_USERNAME
password=YOUR_PASSWORD

[pypitest]
repository=https://testpypi.python.org/pypi
username=YOUR_USERNAME
password=YOUR_PASSWORD

python setup.py register -r pypitest
python setup.py sdist upload -r pypitest

pip install -i https://testpypi.python.org/pypi YourPackageName

python setup.py register -r pypi
python setup.py sdist upload -r pypi

from distutils.core import setup

from setuptools import setup

apt-get install python-setuptools python-wheel

    scripts=['script1', 'script2'],

def main():
    # do your script stuff

if __name__ == "__main__":
    main()

      entry_points={
          'console_scripts': [
              script1=yourpackage.filename:main',
              script2=yourpackage.filename2:main'
          ]
      },

      data_files=[('/usr/share/pixmaps',      ["resources/appname.png"]),
                  ('/usr/share/applications', ["resources/appname.desktop"]),
                  ('/usr/share/appname',      ["resources/pin.png"]),
                 ],

include setup.py
include packagename/*.py
include resources/*

python setup.py sdist

import pygame, pygame.sndarray

def play_for(sample_wave, ms):
    """Play the given NumPy array, as a sound, for ms milliseconds."""
    sound = pygame.sndarray.make_sound(sample_wave)
    sound.play(-1)
    pygame.time.delay(ms)
    sound.stop()

import numpy
import scipy.signal

sample_rate = 44100

def sine_wave(hz, peak, n_samples=sample_rate):
    """Compute N samples of a sine wave with given frequency and peak amplitude.
       Defaults to one second.
    """
    length = sample_rate / float(hz)
    omega = numpy.pi * 2 / length
    xvalues = numpy.arange(int(length)) * omega
    onecycle = peak * numpy.sin(xvalues)
    return numpy.resize(onecycle, (n_samples,)).astype(numpy.int16)

def square_wave(hz, peak, duty_cycle=.5, n_samples=sample_rate):
    """Compute N samples of a sine wave with given frequency and peak amplitude.
       Defaults to one second.
    """
    t = numpy.linspace(0, 1, 500 * 440/hz, endpoint=False)
    wave = scipy.signal.square(2 * numpy.pi * 5 * t, duty=duty_cycle)
    wave = numpy.resize(wave, (n_samples,))
    return (peak / 2 * wave.astype(numpy.int16))

# Play A (440Hz) for 1 second as a sine wave:
play_for(sine_wave(440, 4096), 1000)

# Play A-440 for 1 second as a square wave:
play_for(square_wave(440, 4096), 1000)

play_for(sum([sine_wave(440, 4096), sine_wave(880, 4096)]), 1000)

def make_chord(hz, ratios):
    """Make a chord based on a list of frequency ratios."""
    sampling = 4096
    chord = waveform(hz, sampling)
    for r in ratios[1:]:
        chord = sum([chord, sine_wave(hz * r / ratios[0], sampling)])
    return chord

def major_triad(hz):
    return make_chord(hz, [4, 5, 6])

play_for(major_triad(440), length)

def make_chord(hz, ratios, waveform=None):
    """Make a chord based on a list of frequency ratios
       using a given waveform (defaults to a sine wave).
    """
    sampling = 4096
    if not waveform:
        waveform = sine_wave
    chord = waveform(hz, sampling)
    for r in ratios[1:]:
        chord = sum([chord, waveform(hz * r / ratios[0], sampling)])
    return chord

def major_triad(hz, waveform=None):
    return make_chord(hz, [4, 5, 6], waveform)

play_for(major_triad(440, square_wave), length)

        backButton = gtk.ToolButton(gtk.STOCK_GO_BACK)
        backButton.connect("clicked", self.back_cb)
        self.insert(backButton, -1)
        backButton.show()

        forwardButton = gtk.ToolButton(gtk.STOCK_GO_FORWARD)
        forwardButton.connect("clicked", self.forward_cb)
        self.insert(forwardButton, -1)
        forwardButton.show()

   def back_cb(self, w):
        self.emit("go-back-requested")

    def forward_cb(self, w):
        self.emit("go-forward-requested")

       "go-back-requested": (gobject.SIGNAL_RUN_FIRST,
                              gobject.TYPE_NONE, ()),
       "go-forward-requested": (gobject.SIGNAL_RUN_FIRST,
                              gobject.TYPE_NONE, ()),

        toolbar.connect("go-back-requested", self.go_back_requested_cb,
                        self.content_tabs)
        toolbar.connect("go-forward-requested", self.go_forward_requested_cb,
                        self.content_tabs)

def go_back_requested_cb (self, widget, content_pane):
    # Oops! What goes here?
def go_forward_requested_cb (self, widget, content_pane):
    # Oops! What goes here?

    def current_view(self):
        return self.get_nth_page(self.get_current_page()).get_child()

def go_back_requested_cb (self, widget, content_pane):
    content_pane.current_view().go_back()
def go_forward_requested_cb (self, widget, content_pane):
    content_pane.current_view().go_forward()

pushurl = ssh://git.gnome.org/git/gimp
url = git://git.gnome.org/gimp

pushurl = git@github.com:username/reponame.git
url = https://github.com/username/reponame.git

text/html; firefox 'file://%s'; nametemplate=%s.html
text/html; lynx -dump %s; nametemplate=%s.html; copiousoutput

auto_view text/html
alternative_order text/plain text

application/msword; catdoc %s; copiousoutput
application/vnd.openxmlformats-officedocument.wordprocessingml.document; docx2txt %s -; copiousoutput

firefox -new-window "javascript:document.writeln('<br><h1>Translating documents, please wait ...</h1>');"

firefox -new-window "data:text/html,<br><br><h1>Translating documents, please wait ...</h1>"

<meta http-equiv="refresh" content="2;URL=pleasewait.html">

macro index <F10> "<pipe-message>~/bin/viewmailattachments\n" "View all attachments in browser"
macro pager <F10> "<pipe-message>~/bin/viewmailattachments\n" "View all attachments in browser"

def contrasting_color(color):
    '''Returns a gtk.gdk.Color of similar saturation and value
       to the color passed in, but a contrasting hue.
       gtk.gdk.Color objects have a hue between 0 and 1.
    '''
    if not color:
        return self.first_track_color;

    # How much to jump in hue:
    jump = .37

    return gtk.gdk.color_from_hsv(color.hue + jump,
                                  color.saturation,
                                  color.value)

sudo npm install -g cordova

cordova create hello com.example.hello HelloWorld
cordova platform add android
cordova build

buildozer init
buildozer android debug deploy run

# (int) Android SDK version to use
android.sdk = 21

# (str) Android NDK directory (if empty, it will be automatically downloaded.)
# android.ndk_path = 

# (str) Android SDK directory (if empty, it will be automatically downloaded.)
# android.sdk_path = 

android.ant_path = /usr/bin

kivy/graphics/opengl.c: No such file or directory
 ... many many more lines of compilation interspersed with errors
kivy/graphics/vbo.c:1:2: error: #error Do not use this file, it is the result of a failed Cython compilation.

apt-get purge cython
sudo pip install Cython==0.21.2
rm -rf ./.buildozer/android/platform/python-for-android/dist
rm -rf ./.buildozer/android/platform/python-for-android/build

Exception: Unable to find capture version in ./main.py (looking for `__version__ = ['"](.*)['"]`)

cordova platforms add android
cordova build

cordova plugin search file
cordova plugin add org.apache.cordova.file

import sys
import pyexiv2

if len(sys.argv) < 2:
    print "Usage:", sys.argv[0], "imagename.jpg [tag ...]"
    sys.exit(1)

metadata = pyexiv2.ImageMetadata(sys.argv[1])
metadata.read()

newkeywords = sys.argv[2:]

keyword_tag = 'Iptc.Application2.Keywords'
if keyword_tag in metadata.iptc_keys:
    tag = metadata[keyword_tag]
    oldkeywords = tag.value
    print "Existing keywords:", oldkeywords
    if not newkeywords:
        sys.exit(0)
    for newkey in newkeywords:
        oldkeywords.append(newkey)
    tag.value = oldkeywords
else:
    print "No IPTC keywords set yet"
    if not newkeywords:
        sys.exit(0)
    metadata[keyword_tag] = pyexiv2.IptcTag(keyword_tag, newkeywords)

tag = metadata[keyword_tag]
print "New keywords:", tag.value

metadata.write()

Text version:
http://www.linkedin.com/e/v2?e=3x1l-hzwzd1q8-6f&amp;t=gde&amp;midToken=AQEqep2nxSZJIg&amp;ek=b2_anet_digest&amp;li=82&amp;m=group_discussions&amp;ts=textdisc-6&amp;itemID=5914453683503906819&amp;itemType=member&amp;anetID=98449
HTML version:
http://www.linkedin.com/e/v2?e=3x1l-hzwzd1q8-6f&t=gde&midToken=AQEqep2nxSZJIg&ek=b2_anet_digest&li=17&m=group_discussions&ts=grouppost-disc-6&itemID=5914453683503906819&itemType=member&anetID=98449

Text version:
http://www.linkedin.com/e/v2?e=3x1l-hzwzd1q8-6f&amp;t=gde&amp;midToken= ...
HTML version:
http://www.linkedin.com/e/v2?e=3x1l-hzwzd1q8-6f&t=gde&midToken= ...

&count=1000&paginationToken=

import subprocess, gtk

primary = gtk.clipboard_get(gtk.gdk.SELECTION_PRIMARY)
if not primary.wait_is_text_available() :
    sys.exit(0)
link = primary.wait_for_text()
link = link.replace("\n", "").replace("&amp;", "&") + \
       "&count=1000&paginationToken="
subprocess.call(["firefox", "-new-tab", link])

p1 = ephem.Mars()
p2 = ephem.Jupiter()
observer = ephem.Observer()  # and then set it to your city, etc.
observer.date = ephem.date('2014/8/1')
p1.compute(observer)
p2.compute(observer)

ephem.separation(p1, p2)

Friday:
  Conjunction between Mars and Venus, separation 2.7 degrees.
  Conjunction between the moon and Mars, separation 3.8 degrees.
Saturday:
  Conjunction between Mars and Venus, separation 2.2 degrees.
  Conjunction between Venus and the moon, separation 3.9 degrees.
  Conjunction between the moon and Mars, separation 3.2 degrees.
Sunday:
  Conjunction between Venus and the moon, separation 4.0 degrees.
  Conjunction between the moon and Mars, separation 2.5 degrees.

Conjunction between Mars, Venus and the moon lasts from Friday through Sunday.
  Mars and Venus are closest on Saturday (2.2 degrees).
  The moon and Mars are closest on Sunday (2.5 degrees).

import ephem

planets = [
    ephem.Moon(),
    ephem.Mercury(),
    ephem.Venus(),
    ephem.Mars(),
    ephem.Jupiter(),
    ephem.Saturn()
    ]

observer = ephem.Observer()
observer.name = "Los Alamos"
observer.lon = '-106.2978'
observer.lat = '35.8911'
observer.elevation = 2286  # meters, though the docs don't actually say

observer.date = d
sunset = observer.previous_setting(sun)

min_alt = 10. * math.pi / 180.
for planet in planets:
    observer.date = sunset
    planet.compute(observer)
    if planet.alt > min_alt:
        print planet.name, "is already up at sunset"

    midnight = list(observer.date.tuple())
    midnight[3:6] = [7, 0, 0]
    observer.date = ephem.date(tuple(midnight))
    planet.compute(observer)
    if planet.alt > min_alt:
        print planet.name, "will rise before midnight"

import time

start = time.time()

for i in xrange(500000):
    print "Now we have printed", i, "relatively long lines to stdout."

print time.time() - start, "seconds to print", i, "lines."

import email

fp = open(msgfile)
msg = email.message_from_file(fp)
fp.close()

for part in msg.walk():

['Content-Type', 
 'Content-Transfer-Encoding',
 'Content-ID',
 'Content-Disposition' ]

    for k in part.keys():
        if k.lower() == 'content-id':
            print "Content ID is", part[k]

for k in part.keys():
    if k.lower() == 'content-id':
        if part[k].startswith('<') and part[k].endswith('>'):
            part[k] = part[k][1:-1]

for k in part.keys():
    if k.lower() == 'content-id':
        content_id = part[k]
        if content_id.startswith('<') and content_id.endswith('>'):
            content_id = content_id[1:-1]

    htmlsrc = html_part.get_payload(decode=True)
    for sf in subfiles:
        htmlsrc = re.sub('cid: ?' + sf['Content-Id'],
                         'file://' + sf['filename'],
                         htmlsrc, flags=re.IGNORECASE)

# macro  index  <F10>  "<copy-message>/tmp/mutttmpbox\n<enter><shell-escape>~/bin/viewhtmlmail.py\n" "View HTML in browser"
# macro  pager  <F10>  "<copy-message>/tmp/mutttmpbox\n<enter><shell-escape>~/bin/viewhtmlmail.py\n" "View HTML in browser"

    match = re.search('.*[A-Z]{2}\s+\d{5}$', line)

    numeric = '[\+\-\d\.]'
    match = re.search('^(%s+)\s+(%s+)$' % (numeric, numeric),
                      line)

from googlemaps import GoogleMaps

gmaps = GoogleMaps('YOUR GOOGLE MAPS API KEY HERE')
try:
    lat, lon = gmaps.address_to_latlng(addr)
except googlemaps.GoogleMapsError, e:
    print "Oh, no! Couldn't geocode", addr
    print e

% stty size
32 80

fcntl.ioctl(fd, termios.TIOCSWINSZ,
            struct.pack("HHHH", rows, cols, 0, 0))

import sys
import apt

cache = apt.cache.Cache()

pat = sys.argv[1]

for pkgname in cache.keys():
    if pat in pkgname:
        pkg = cache[pkgname]
        instver = pkg.installed
        if instver:
            print pkg.name, instver.version

STN--- WBAN   YEARMODA    TEMP       DEWP      SLP        STP       VISIB      WDSP     MXSPD   GUST    MAX     MIN   PRCP   SNDP   FRSHTT
724945 23293  20120101    49.5 24    38.8 24  1021.1 24  1019.5 24    9.9 24    1.5 24    4.1  999.9    68.0    37.0   0.00G 999.9  000000

>>> import keyword
>>> keyword.kwlist
['and', 'as', 'assert', 'break', 'class', 'continue', 'def', 'del', 'elif', 'else', 'except', 'exec', 'finally', 'for', 'from', 'global', 'if', 'import', 'in', 'is', 'lambda', 'not', 'or', 'pass', 'print', 'raise', 'return', 'try', 'while', 'with', 'yield']

>>> set([1, 2, 3, 2, 2, 4, 5, 1, 5])
set([1, 2, 3, 4, 5])

>>> [ x for x in 'hello' ]
['h', 'e', 'l', 'l', 'o']

>>> [[c for c in w] for w in keyword.kwlist]
[['a', 'n', 'd'], ['a', 's'], ['a', 's', 's', 'e', 'r', 't'], ... ]

[item for sublist in [[c for c in w] for w in keyword.kwlist] for item in sublist]

reduce(lambda x,y: x+y, [[c for c in w] for w in keyword.kwlist])

import itertools
list(itertools.chain.from_iterable([[c for c in w] for w in keyword.kwlist]))

sum([[c for c in w] for w in keyword.kwlist], [])

>>> set('bubble')
set(['e', 'b', 'u', 'l'])

>>> set(''.join(keyword.kwlist))
set(['a', 'c', 'b', 'e', 'd', 'g', 'f', 'i', 'h', 'k', 'm', 'l', 'o', 'n', 'p', 's', 'r', 'u', 't', 'w', 'y', 'x'])

>>> string.lowercase
'abcdefghijklmnopqrstuvwxyz'

>>> [chr(i) for i in range(ord('a'), ord('z')+1)]
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']

>>> set(string.lowercase[:]) - set(''.join(keyword.kwlist))
set(['q', 'j', 'z', 'v'])

sudo apt-get install ipython python-opencv python-scipy python-numpy python-pygame python-setuptools python-pip

sudo pip install https://github.com/ingenuitas/SimpleCV/zipball/master

wget https://github.com/ingenuitas/SimpleCV/master

pip install http:///home/pi/master --download-cache /home/pi/tmp

img = Image('lenna')
img.show()
img.binarize().show()
img.toGray().show()
img.edges().show()
img.invert().show()

img.listHaarFeatures()
img.findHaarFeatures('eye.xml').draw(color=Color.YELLOW)

#define QIK_GET_FIRMWARE_VERSION         0x81
#define QIK_GET_ERROR_BYTE               0x82
#define QIK_GET_CONFIGURATION_PARAMETER  0x83
[ ... ]
#define QIK_CONFIG_DEVICE_ID                        0
#define QIK_CONFIG_PWM_PARAMETER                    1

    QIK_GET_FIRMWARE_VERSION = 0x81
    QIK_GET_ERROR_BYTE = 0x82
    QIK_GET_CONFIGURATION_PARAMETER = 0x83
[ ... ]
    QIK_CONFIG_DEVICE_ID = 0
    QIK_CONFIG_PWM_PARAMETER = 1

>>> sun = ephem.Sun()
>>> la = ephem.city('Los Angeles')
>>> sf = ephem.city('San Francisco')
>>> 
>>> mid = ephem.Date('2012/10/31 8:00')
>>> 
>>> la.next_rising(sun, start=mid)
2012/10/31 14:11:57
>>> la.next_setting(sun, start=mid)
2012/11/1 01:00:45
>>> la.next_setting(sun, start=mid) - la.next_rising(sun, start=mid)
0.45055988136300584
>>> 
>>> sf.next_rising(sun, start=mid)
2012/10/31 14:34:19
>>> sf.next_setting(sun, start=mid)
2012/11/1 01:11:44
>>> sf.next_setting(sun, start=mid) - sf.next_rising(sun, start=mid)
0.4426457611261867

>>> (la.next_setting(sun, start=mid) - la.next_rising(sun, start=mid)) - (sf.next_setting(sun, start=mid) - sf.next_rising(sun, start=mid))
0.007914120236819144
>>> ((la.next_setting(sun, start=mid) - la.next_rising(sun, start=mid)) - (sf.next_setting(sun, start=mid) - sf.next_rising(sun, start=mid))) * 24
0.18993888568365946
>>> ((la.next_setting(sun, start=mid) - la.next_rising(sun, start=mid)) - (sf.next_setting(sun, start=mid) - sf.next_rising(sun, start=mid))) * 24 * 60
11.396333141019568

    if self.current :
        if self.current.poll() == None :
            # Current process hasn't finished yet. Is this the same sound?
            if path == self.curpath :
                # A repeat of the currently playing sound.
                # Don't play it more than once.
                return
            else :
                # Trying to play a different sound.
                # Wait on the current sound then play the new one.
                self.wait()

    self.curpath = path
    self.current = subprocess.Popen([ "/usr/bin/aplay", '-q', path ] )

    def __del__(self) :
        self.wait()

img = gimp_image_list()[0]
img.parasite_list()
img.parasite_find(img.parasite_list()[0])

    pdb.gimp_file_save(img, drawable, img.filename, img.filename)
    pdb.gimp_image_clean_all(img)

    counts = collections.Counter()
    for img in gimp.image_list() :
        if img.filename :
            counts[os.path.dirname(img.filename)] += 1
    try :
        return counts.most_common(1)[0][0]
    except :
        return None

<dc:subject>Science fiction</dc:subject>

ozf.writestr(info, dom.toprettyxml().encode(encoding, 'xmlcharrefreplace'))

writestr(info, dom.toprettyxml(encoding=encoding)

apt-get install python-stdeb fakeroot python-all

[DEFAULT]
Suite: precise

python setup.py --command-packages=stdeb.command bdist_deb

python setup.py --command-packages=stdeb.command sdist_dsc

dpkg-buildpackage: binary only upload (no source included)

import ephem

venus = ephem.Venus()

print '%10s   %6s %6s %6s %6s' % ('date', '%', 'mag', 'dist', 'size')
def print_venus(when) :
    venus.compute(when)
    fmt = '%02d-%02d-%02d   %6.2f %6.2f %6.2f %6.2f'
    trip = when.triple()
    print fmt % (trip[0], trip[1], trip[2],
                 venus.phase, venus.mag, venus.earth_distance, venus.size)

# Loop from the beginning of 2012 through the middle of 2013:
d = ephem.date('2012')
end_date = ephem.date('2013/6/1')
while d < end_date :
    print_venus(d)
    # Add a week:
    d = ephem.date(d + ephem.hour * 24)

import PythonMagick
filename = 'img001.jpg'
img = PythonMagick.Image(filename)
size = img.size()
print filename, "is", size.width(), "x", size.height()

>>> img.scale('1024x768')
>>> img.size().height()
640

>>> help(img.scale)
Help on method scale:

scale(...) method of PythonMagick.Image instance
    scale( (Image)arg1, (Geometry)arg2) -> None :

        C++ signature :
            void scale(Magick::Image {lvalue},Magick::Geometry)

from PIL import Image
im = Image.open(filename)
w = im.size[0]
h = im.size[1]
print filename, "is", w, "x", h

newim = im.resize((w/2, h/2))
newim.save("small-" + filename)

import PIL.ExifTags

exif = im._getexif()
for tag, value in exif.items():
    decoded = PIL.ExifTags.TAGS.get(tag, tag)
    print decoded, '->', value

for tag, value in exif.items():
    decoded = PIL.ExifTags.TAGS.get(tag, tag)
    if decoded == 'Orientation':
        print decoded, ":", value

    "arduino.html",
    "img.html?pix/arduinos/arduino-clones.jpg",
    "getting_started.html",
    "img.html?pix/projects/led.jpg",
    //"blink.html",
    "arduino-ide.html",

qhtmlprint ` fgrep .html navigate.js  | grep -v // | sed -e 's/",/"/' -e 's/"//g' `

gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=slidedeck.pdf -dBATCH file*.pdf

from HTMLParser import HTMLParser

class MyFancyHTMLParser(HTMLParser):
  def fetch_url(self, url) :
    request = urllib2.Request(url)
    response = urllib2.urlopen(request)
    link = response.geturl()
    html = response.read()
    response.close()
    self.feed(html)   # feed() starts the HTMLParser parsing

  def handle_starttag(self, tag, attrs):
    if tag == 'img' :
      # attrs is a list of tuples, (attribute, value)
      srcindex = self.has_attr('src', attrs)
      if srcindex < 0 :
        return   # img with no src tag? skip it
      src = attrs[srcindex][1]
      # Make relative URLs absolute
      src = self.make_absolute(src)
      attrs[srcindex] = (attrs[srcindex][0], src)

    print '<' + tag
    for attr in attrs :
      print ' ' + attr[0]
      if len(attr) > 1 and type(attr[1]) == 'str' :
        # make sure attr[1] doesn't have any embedded double-quotes
        val = attr[1].replace('"', '\"')
        print '="' + val + '"')
    print '>'

  def handle_endtag(self, tag):
    self.outfile.write('</' + tag.encode(self.encoding) + '>\n')

  tree = lxml.html.fromstring(html)

for e in tree.iter() :
  print e.tag

def crawl_tree(tree) :
  handle_starttag(tree.tag, tree.attrib)
  if tree.text :
    handle_data(tree.text)
  for node in tree :
    crawl_tree(node)
  handle_endtag(tree.tag)

def crawl_tree(tree) :
  if type(tree.tag) is str :
    handle_starttag(tree.tag, tree.attrib)
    if tree.text :
      handle_data(tree.text)
    for node in tree :
      crawl_tree(node)
    handle_endtag(tree.tag)
  if tree.tail :
    handle_data(tree.tail)

import ephem
observer = ephem.city('San Francisco')
sun = ephem.Sun()
sun.compute(observer)
print sun.alt, sun.az

observer = ephem.Observer()
observer.name = "San Jose"
observer.lon = '-121:56.8'
observer.lat = '37:15.55'

    for m in range(1, 13) :
        observer.date('2011/%d/15 12:00' % (m))
        sun.compute(observer)

    # Y scale is 45 degrees (PI/2), horizon to halfway to zenith:
    y = int(self.height - float(self.sun.alt) * self.height / math.pi)
    # So make X scale 45 degrees too, centered around due south.
    # Want az = PI to come out at x = width/2.
    x = int(float(self.sun.az) * self.width / math.pi / 2)
    # print self.sun.az, float(self.sun.az), float(self.sun.alt), x, y
    self.drawing_area.window.draw_arc(self.xgc, True, x, y, 4, 4, 0, 23040)

    date = '2011/%d/12 12:00' % (m)
    adjtime = ephem.date(ephem.date(date) \
                    - float(self.observer.lon) * 12 / math.pi * ephem.hour)
    observer.date = adjtime

>>> ephem.next_solstice('2011/8/1')
2011/12/22 05:29:52

ephem.date(ephem.next_solstice('2011/8/1') - 8./24)
2011/12/21 21:29:52

>>> import ephem
>>> observer = ephem.city("San Francisco")
>>> sun = ephem.Sun()
>>> for i in range(20,25) :
...   d = '2011/12/%i 20:00' % i
...   print d, (observer.next_setting(sun, d) - observer.previous_rising(sun, d)) * 24
2011/12/20 20:00 9.56007901422
2011/12/21 20:00 9.55920379754
2011/12/22 20:00 9.55932991847
2011/12/23 20:00 9.56045709446
2011/12/24 20:00 9.56258416496

    Serial.begin(9600);

    Serial.println(val);

import serial

ser = serial.Serial("/dev/ttyUSB0", 9600)
while True:
    print ser.readline()

while True :
    # Check whether the user has typed anything (timeout of .2 sec):
    inp, outp, err = select.select([sys.stdin, self.ser], [], [], .2)

    # If the user has typed anything, send it to the Arduino:
    if sys.stdin in inp :
        line = sys.stdin.readline()
        self.ser.write(line)

    # If the Arduino has printed anything, display it:
    if self.ser in inp :
line = self.ser.readline().strip()
print "Arduino:", line

  Override Redirect State: yes

from Xlib import display

dpy = display.Display()
screen = dpy.screen()
root = screen.root
tree = root.query_tree()

for w in tree.children :
    print w

for w in tree.children :
    print w.get_wm_name(), w.get_attributes()

for w in tree.children :
    att = w.get_attributes()
    if att.map_state and att.override_redirect :
        print w.get_wm_name(), att

for w in tree.children :
    att = w.get_attributes()
    if att.map_state and att.override_redirect and w.get_wm_transient_for():
        w.unmap()

dpy.flush()

    <keybind key="W-t">
      <action name="Execute">
        <execute>/home/akkana/bin/countsel</execute>
      </action>
    </keybind>

import xlrd

for filename in sys.argv[1:] :
    wb = xlrd.open_workbook(filename)
    for sheetname in wb.sheet_names() :
        sh = wb.sheet_by_name(sheetname)
        for rownum in range(sh.nrows) :
            print sh.row_values(rownum)

server = "mail.example.com"
port = 995
user = "myname"
passwd = "seekrit"

pop = poplib.POP3_SSL(server, port)
pop.user(user)
pop.pass_(passwd)

poplist = pop.list()
if poplist[0].startswith('+OK') :
    msglist = poplist[1]
    for msgspec in msglist :
        # msgspec is something like "3 3941", 
        # msg number and size in octets
        msgnum = int(msgspec.split(' ')[0])
        print "Deleting msg %d\r" % msgnum,
        pop.dele(msgnum)
    else :
        print "No messages for", user
else :
    print "Couldn't list messages: status", poplist[0]
pop.quit()

$ sudo apt-get install rpm

$ python setup.py bdist_rpm

#!/usr/bin/env python
# Set the volume louder or softer, depending on program name.

import alsaaudio, sys, os

increment = 4

# First find a mixer. Use the first one.
try :
    mixer = alsaaudio.Mixer('Master', 0)
except alsaaudio.ALSAAudioError :
    sys.stderr.write("No such mixer\n")
    sys.exit(1)

cur = mixer.getvolume()[0]
if os.path.basename(sys.argv[0]).startswith("louder") :
    mixer.setvolume(cur + increment, alsaaudio.MIXER_CHANNEL_ALL)
else :
    mixer.setvolume(cur - increment, alsaaudio.MIXER_CHANNEL_ALL)
print "Volume from", cur, "to", mixer.getvolume()[0]

import sys, simplejson, urllib, urllib2

def get_search_data(query):
    s = simplejson.loads(urllib2.urlopen(
            urllib2.Request("http://search.twitter.com/search.json",
                            urllib.urlencode({"q": query}))).read())
    return s

def json_search(query):
    for data in get_search_data(query)["results"]:
        yield data

if __name__ == "__main__" :
    for searchterm in sys.argv[1:] :
        print "**** Tweets containing", searchterm
        statuses = json_search(searchterm)
        for st in statuses :
            print st['created_at']
            print "<%s> %s" % (st['from_user'], st['text'])
            print ""

#! /usr/bin/env python

# Cartalk puzzler Feb 2011

import random, time

random.seed()

tot = 0
wins = 0

while True:
    # pick 3 numbers:
    n1 = random.randint(0, 100)
    n2 = random.randint(0, 100)
    n3 = random.randint(0, 100)

    # Always look at but discard the first number.
    # If the second number is greater than the first, stick with it;
    # otherwise choose the third number.
    if n2 > n1 :
        final = n2
    else :
        final = n3

    biggest = max(n1, n2, n3)
    win = (final == biggest)
    tot += 1
    if win :
        wins += 1
    print "%4d %4d %4d %10d %10s %6d/%-6d = %10d%%" % (n1, n2, n3, final,
                                                       str(win),
                                                       wins, tot,
                                                       int(wins*100/tot))
    if tot % 1000 == 0:
        print "(%d ...)" % tot
        time.sleep(1)

#! /usr/bin/env python

# Display the colors available in a terminal.

print "16-color mode:"
for color in range(0, 16) :
    for i in range(0, 3) :
        print "\033[0;%sm%02s\033[m" % (str(color + 30), str(color)),
    print

# Programs like ls and vim use the first 16 colors of the 256-color palette.
print "256-color mode:"
for color in range(0, 256) :
    for i in range(0, 3) :
        print "\033[38;5;%sm%03s\033[m" % (str(color), str(color)),
    print

$ grep color /etc/X11/app-defaults/XTerm-color
irrelevant stuff snipped
*VT100*color0: black
*VT100*color1: red3
*VT100*color2: green3
*VT100*color3: yellow3
*VT100*color4: blue2
*VT100*color5: magenta3
*VT100*color6: cyan3
*VT100*color7: gray90
*VT100*color8: gray50
*VT100*color9: red
*VT100*color10: green
*VT100*color11: yellow
*VT100*color12: rgb:5c/5c/ff
*VT100*color13: magenta
*VT100*color14: cyan
*VT100*color15: white
! Disclaimer: there are no standard colors used in terminal emulation.
! The choice for color4 and color12 is a tradeoff between contrast, depending
! on whether they are used for text or backgrounds.  Note that either color4 or
! color12 would be used for text, while only color4 would be used for a
! Originally color4/color12 were set to the names blue3/blue
!*VT100*color4: blue3
!*VT100*color12: blue
!*VT100*color4: DodgerBlue1
!*VT100*color12: SteelBlue1

!! color2 was green3
*VT100*color2: green4
!! color8 was gray50
*VT100*color8: gray30
!! color10 was green
*VT100*color10: rgb:00/aa/00
!! color11 was yellow
*VT100*color11: dark orange
!! color14 was cyan
*VT100*color14: dark cyan

import sys

class tee :
    def __init__(self, _fd1, _fd2) :
        self.fd1 = _fd1
        self.fd2 = _fd2

    def __del__(self) :
        if self.fd1 != sys.stdout and self.fd1 != sys.stderr :
            self.fd1.close()
        if self.fd2 != sys.stdout and self.fd2 != sys.stderr :
            self.fd2.close()

    def write(self, text) :
        self.fd1.write(text)
        self.fd2.write(text)

    def flush(self) :
        self.fd1.flush()
        self.fd2.flush()

stderrsav = sys.stderr
outputlog = open(logfilename, "w")
sys.stderr = tee(stderrsav, outputlog)

drawing_area.connect("button-release-event", button_event)
drawing_area.set_events(gtk.gdk.EXPOSURE_MASK |
                        # next line wasn't needed before:
                        gtk.gdk.BUTTON_PRESS_MASK |
                        gtk.gdk.BUTTON_RELEASE_MASK )

#!/usr/bin/env python
# python-gtk-webkit presentation program.
# Copyright (C) 2009 by Akkana Peck.
# Share and enjoy under the GPL v2 or later.

import sys
import gobject
import gtk
import webkit

class WebBrowser(gtk.Window):
    def __init__(self, url):
        gtk.Window.__init__(self)
        self.fullscreen()

        self._browser= webkit.WebView()
        self.add(self._browser)
        self.connect('destroy', gtk.main_quit)

        self._browser.open(url)
        self.show_all()

if __name__ == "__main__":
    if len(sys.argv) <= 1 :
        print "Usage:", sys.argv[0], "url"
        sys.exit(0)

    gobject.threads_init()
    webbrowser = WebBrowser(sys.argv[1])
    gtk.main()

grep find `egrep -l '#\\!.*python' *`
grep find `file * | grep python | sed 's/:.*//'`
i in foo; file $i|grep python && grep find $i; done    # in sh/bash

alias greplang "grep \!:2-$ `file * | grep \!:1 | sed 's/:.*//'`"

langgrep python -w find ~/bin/*

from array import array

[ ... setting up ... ]
        # initialize the regions and get their contents into arrays:
        srcRgn = layer.get_pixel_rgn(0, 0, srcWidth, srcHeight,
                                     False, False)
        src_pixels = array("B", srcRgn[0:srcWidth, 0:srcHeight])

        dstRgn = destDrawable.get_pixel_rgn(0, 0, newWidth, newHeight,
                                            True, True)
        p_size = len(srcRgn[0,0])               
        dest_pixels = array("B", "\x00" * (newWidth * newHeight * p_size))

[ ... then inside the loop over x and y ... ]
                        src_pos = (x + srcWidth * y) * p_size
                        dest_pos = (newx + newWidth * newy) * p_size

                        newval = src_pixels[src_pos: src_pos + p_size]
                        dest_pixels[dest_pos : dest_pos + p_size] = newval

[ ... when the loop is all finished ... ]
        # Copy the whole array back to the pixel region:
        dstRgn[0:newWidth, 0:newHeight] = dest_pixels.tostring() 

(sleep 300; zenity --info --text="Turn off the water!") &

export DISPLAY=:0.0
zenity --info --text="Your cornbread is ready"

eggtimer 5 Turn off the water

Terminal type	Seconds
xterm, visible	56.0
xterm, other desktop	8.0
xterm, shaded	8.5
xterm, iconified	8.0
Linux framebuffer, visible	179.1
Linux framebuffer, hidden	3.7
gnome-terminal, visible	56.9
gnome-terminal, other desktop	56.7
gnome-terminal, iconified	56.7
gnome-terminal, shaded	43.8

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Shallow Thoughts : tags : python

Fri, 15 Nov 2024

Fri, 13 Sep 2024

Thu, 01 Aug 2024

Sat, 04 May 2024

Thu, 18 Apr 2024

Sun, 10 Mar 2024

Mon, 20 Nov 2023

Thu, 28 Sep 2023

Fri, 22 Sep 2023

Thu, 07 Sep 2023

Sun, 19 Mar 2023

Sun, 18 Dec 2022

Thu, 23 Jun 2022

Sun, 12 Dec 2021

Fri, 03 Dec 2021

Sat, 20 Nov 2021

Thu, 11 Nov 2021

Handling Errors and Timeouts

Sun, 07 Nov 2021

Tue, 02 Nov 2021

Tue, 30 Mar 2021

Thu, 21 Jan 2021

Thu, 16 Jul 2020

Sat, 11 Jul 2020

Fri, 29 May 2020

GIS "Dissolving"

Sun, 01 Mar 2020

Thu, 27 Feb 2020

Sensing Soil Moisture

Driving a Water Pump

Sat, 08 Feb 2020

A Simple Plaintext Kiosk Python Script

JavaScript: Resizing Text to Fit Available Space

JS Timers on Slow Machines

Memory Leaks in JavaScript's innerHTML

Python html2text

Sat, 01 Feb 2020

Create a User and a Database

pgloader (if you have a very recent pgloader)

On an Older OS: Use pgloader Remotely

Migrate Autoincrements to Sequences

Test

Database Backups

Verify You're Using The New Database

Tue, 14 Jan 2020

Tue, 01 Oct 2019

Step 1: Get Some GeoJSON

Step 2: Show the GeoJSON in a Folium Map

Thu, 01 Aug 2019

If You Can't Beat 'Em, Join 'Em

How Does It Work?

A More Compact Format

A Python Driven Web Page

More Advanced Programmers: Making it Funnier

Wed, 17 Jul 2019

Explore Your Test Data

Choose an Observing Spot

Convert to PNG

Use the Data to Set Camera and Light Angles

Povray Glitches

All Together Now

Next Steps

Sun, 07 Jul 2019

Get the DEM data

USGS

Unencumbered DEM Sources

Verify the Data: gdaldem

Translate the Data to Another Format

Get Vertical Limits, for Scaling

Translate Between Lat/Lon and Pixel Coordinates

Thu, 13 Jun 2019

The Background: Stonehenge Decoded

A Modern Re-Creation of Hawkins' Work

Wed, 05 Jun 2019

How to Apply a Stylesheet

Built-in Class Names

User-set Class Names

Widget Names, like CSS ID

Properties You Can Set