Re: recursion in Class-methods?

[defn noob]

class Graph(object):

where does anyone write like that? I've seen only examples like i have
written.

is the object then passed to init?


class Graph(object):
def __init__(self, dictionary):
self.structure = dictionary

or

class Graph(object):
def __init__(self, object):
self.structure = object


i dont get it.




and "mutable containers", do you refer to "path=[]" as a parameter.
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Re: recursion in Class-methods?

[defn noob]

>
> > if start == end:
> > return path
> > if not self.dictionary.has_key(start):
>
>if start not in self.dictionnary:
>
> > return None
> > for node in self.dictionary[start]:
> > if node not in path:
> > newpath = find_path(self.dictionary, node, end, path)
>
>newpath = self.find_path(...)
>
> (snip remaining code - same problems, same solutions...)

it is to incoherent fo follow what you mean here(not meaning to sound
rude i appreciate the help).
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How to "rebind" py2.5.1 to run from comprompt after uninstalling py3.0?

[defn noob]

I installed python30 and so command prompt runs all pythonprograms
through that which i didnt want so i uninstalled it.

now i cant start any pythonprograms through the commandprompt.

how do I "rebind" python25 to luanch when claling .py-files from the
command prompt?
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Pygame, how to show window without loop? no loop=popupand close...

[defn noob]

Im using PyGame to draw images of graphs and trees. Howver right now i
am looping using:

while 1:
for event in pygame.event.get():
if event.type == pygame.QUIT: sys.exit()

screen.fill(screencolor)

pygame.draw.circle(screen, linecolor, (500, 20), 12, 0)

draw((500, 20), 3)

pygame.display.flip()


if i do

screen.fill(screencolor)

pygame.draw.circle(screen, linecolor, (500, 20), 12, 0)

draw((500, 20), 3)

pygame.display.flip()

it just pops up and closes. how can i make it stay until i close it
without using a loop?
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Re: Pygame, how to show window without loop? no loop=popupand close...

[defn noob]

right. im an idiot anyway. i can just draw the lines before entering
the loop, problem solved...
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Re: Pygame, how to show window without loop? no loop=popupand close...

[defn noob]

On 28 Juni, 08:32, Carl Banks <[EMAIL PROTECTED]> wrote:
> On Jun 27, 10:58 pm, defn noob <[EMAIL PROTECTED]> wrote:
>
> > right. im an idiot anyway. i can just draw the lines before entering
> > the loop, problem solved...
>
> Do not do that; it'll create a busy loop and use 100% of CPU.  Use
> pygame.event.wait() instead.  It waits for an event to occur, without
> using CPU cycles.
>
> Carl Banks




pygame.init()
screen = pygame.display.set_mode(size)

while 1:
for event in pygame.event.get():
if event.type == pygame.QUIT: sys.exit()
screen.fill(screencolor)
draw((500, 20), 5)
pygame.display.flip()
pygame.event.wait()


running that i cant close the program... what must i do? create an
event at mouse click?
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tkinter, loading image error, TclError: couldn't recognize data in image file "C:/users/me/desktop/images/blob4.jpg"

[defn noob]

from Tkinter import *
import os

master = Tk()
w = Canvas(master, width=800, height=600)

print os.path.exists('C:/me/saftarn/desktop/images/blob4.jpg')

im = PhotoImage(file = 'C:/users/saftarn/desktop/images/blob4.jpg')
#im = file = 'C:/users/me/desktop/images/blob4.jpg'
pic = w.create_image(0, 0, image = im, anchor = NW)

#image = open('C:/users/saftarn/desktop/images/blob.png')

colors = []
for x in range(1, 800):
for y in range(1, 600):
pic = w.find_closest(x, y)[0]
obj = objects[pic]
colors.append(obj.get(int(x), int(y)))

print colors



>>>
True

Traceback (most recent call last):
  File "C:/Python25/Progs/ImageVideoSearch/imId.py", line 9, in

im = PhotoImage(file = 'C:/users/me/desktop/images/blob4.jpg')
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 3270, in __init__
Image.__init__(self, 'photo', name, cnf, master, **kw)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 3226, in __init__
self.tk.call(('image', 'create', imgtype, name,) + options)
TclError: couldn't recognize data in image file "C:/users/me/desktop/
images/blob4.jpg"
>>>



it has worked before opening and displaying a file like this, anything
to do with python 2.52, upgraded from 2.5.1
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Most efficient way to get pixelcolors of an image?

[defn noob]

i want to process a large number of images and store their respective
pixels in a matrix.

what is the mostt efficient way of opening and checking them?
i doubt pygame is made for this purpose :)

i guess i could also use tkinter?


and why cant i print out matrix after getting the pixels? do i have to
deinit() pygame somehow?

import pygame
import sys
import os

print os.path.exists('C:/users/saftarn/desktop/images/bloba.bmp')

pygame.init()
screen = pygame.display.set_mode((800, 600))

image = pygame.image.load('C:/users/saftarn/desktop/images/bloba.bmp')
imrect = image.get_rect()
imrect = imrect.move(200, 200)

matrix = []

while 1:
pygame.display.flip()
screen.fill((255,255,255))
screen.blit(image, imrect)
pygame.event.wait()
event = pygame.event.wait()

for x in range(1, 301):
for y in range(1, 301):
matrix.append(screen.get_at((x, y)))

#print matrix
if event.type == pygame.QUIT:
#print matrix
sys.exit()
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Run interpreter in emacs?

[defn noob]

Can I run the python interpreter from with in Emacs?

Do i have to change anything then? or is it by default? it already
syntax-highlights python-files.
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Re: Most efficient way to get pixelcolors of an image?

[defn noob]

this just shows a GUI that normally shows pictures but it doesnt show
any picture...


from PIL import Image

im = Image.open('C:/Users/saftarn/Desktop/images/giffer.gif')
im2 = Image.open('C:/Users/saftarn/Desktop/images/blob.jpg')

im.rotate(45).show()
im2.show()


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Re: Run interpreter in emacs?

[defn noob]

thanks but i dont quite understand the load-path, add to the load
path. the loadpath has a lot of variables.

so where i should i place the python-mode folder and should i then add
that directory to the loadpath?
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PIL(Py Image lib), show() not showing picture...

[defn noob]

from PIL import Image
import os

print os.path.exists('C:/Users/saftarn/Desktop/images/blob.jpg')

im2 = Image.open('C:/Users/saftarn/Desktop/images/blob.jpg')
im2.show()
first the command prompt pops up then the normal window to display
pictures but it doenst show a picture.

the prin os.path.exists returns true and opening the file by clicking
on it works. ive also tried gif-files with no success.
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site-packages, unzipepd there but import fails

[defn noob]

i unzipped and put the folder in site-packages. when i run setup.py
install nothing happens.

when i do import pp from shell it complains it doesnt exist.

isnt placing the folder in site-packages enough?





these setup.py-files often dont work but normally it still works.

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Re: site-packages, unzipepd there but import fails

[defn noob]

On Jul 3, 5:02 pm, Chris <[EMAIL PROTECTED]> wrote:
> On Jul 3, 4:11 pm, defn noob <[EMAIL PROTECTED]> wrote:
>
> > i unzipped and put the folder in site-packages. when i run setup.py
> > install nothing happens.
>
> > when i do import pp from shell it complains it doesnt exist.
>
> > isnt placing the folder in site-packages enough?
>
> > these setup.py-files often dont work but normally it still works.
>
> "python setup.py install"

windows...i run setup.py install
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Re: site-packages, unzipepd there but import fails

[defn noob]

well the reason i unzipped and placed it in site-packages was because
nothign happened when i ran setup.py(unzipped). this has worked with
other packages before.
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Re: site-packages, unzipepd there but import fails

[defn noob]

and yes it is parallel python.

and windows vista.

and the python GUI shell.
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Re: manipulating movie files with Python

[defn noob]

I would love the same thing. Dont know what you are doing but this
might be relevant even if it is not what you are asking for:
http://imdbpy.sourceforge.net/
library to take data from imdb.
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Re: site-packages, unzipepd there but import fails

[defn noob]

On Jul 3, 8:06 pm, "[EMAIL PROTECTED]"
<[EMAIL PROTECTED]> wrote:
> On 3 juil, 18:51, defn noob <[EMAIL PROTECTED]> wrote:
>
> > well the reason i unzipped and placed it in site-packages was because
> > nothign happened when i ran setup.py(unzipped).
>
> What do you mean, "running setup.py unzipped" ???
>
> The correct way to install a package is to:
>
> - unzip (untar, whatever) the archive somewhere in your own directory
> - cd to the unzipped directory
> - *from there*, run python setup.py install

yes, which i have done.

the command row executes but nothing happens, no errors either.
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Re: Not necessarily related to python Web Crawlers

[defn noob]

just crawling is supereasy. its how to index and search that is hard.
just start at yahoo.com, scrape out all the links and then for every
site visit every link.
i wrote a crawler in 15 lines of code. but then it all it did was
visit the sites, not indexing them or anything.

you could write a faster one in C++ probably but if you are new to it
doing it in python will let you experiment and learn faster.

some links:
http://infolab.stanford.edu/~backrub/google.html
http://www-csli.stanford.edu/~hinrich/information-retrieval-book.html



http://www.example-code.com/python/pythonspider.asp
http://www.example-code.com/python/spider_simpleCrawler.asp
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isPrime works but UnBoundLocalError when mapping on list

[defn noob]

isPrime works when just calling a nbr but not when iterating on a
list, why? adding x=1 makes it work though but why do I have to add
it?
Is there a cleaner way to do it?


def isPrime(nbr):
for x in range(2, nbr + 1):
if nbr % x == 0:
break
if x == nbr:
return True
else:
return False

>>> [isPrime(y) for y in range(11)]

Traceback (most recent call last):
  File "", line 1, in 
[isPrime(y) for y in range(11)]
  File "C:\Python25\Progs\blandat\myMath.py", line 9, in isPrime
if x == nbr:
UnboundLocalError: local variable 'x' referenced before assignment


>>> map(isPrime, range(100))

Traceback (most recent call last):
  File "", line 1, in 
map(isPrime, range(100))
  File "C:\Python25\Progs\blandat\myMath.py", line 9, in isPrime
if x == nbr:
UnboundLocalError: local variable 'x' referenced before assignment
>>> isPrime(10)
False
>>> isPrime(11)
True



adding x=1 makes it work though:

def isPrime(nbr):
x=1
for x in range(2, nbr + 1):
if nbr % x == 0:
break
if x == nbr:
return True
else:
return False


>>> [isPrime(y) for y in range(11)]
[False, True, True, True, False, True, False, True, False, False,
False]
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Re: isPrime works but UnBoundLocalError when mapping on list

[defn noob]

On Jul 15, 7:28 pm, Mensanator <[EMAIL PROTECTED]> wrote:
> On Jul 15, 11:26 am, defn noob <[EMAIL PROTECTED]> wrote:
>
>
>
> > isPrime works when just calling a nbr but not when iterating on a
> > list, why? adding x=1 makes it work though but why do I have to add
> > it?
> > Is there a cleaner way to do it?
>
> > def isPrime(nbr):
> >     for x in range(2, nbr + 1):
> >         if nbr % x == 0:
> >             break
> >     if x == nbr:
> >         return True
> >     else:
> >         return False
>
> > >>> [isPrime(y) for y in range(11)]
>
> > Traceback (most recent call last):
> >   File "", line 1, in 
> >     [isPrime(y) for y in range(11)]
> >   File "C:\Python25\Progs\blandat\myMath.py", line 9, in isPrime
> >     if x == nbr:
> > UnboundLocalError: local variable 'x' referenced before assignment
>
> > >>> map(isPrime, range(100))
>
> > Traceback (most recent call last):
> >   File "", line 1, in 
> >     map(isPrime, range(100))
> >   File "C:\Python25\Progs\blandat\myMath.py", line 9, in isPrime
> >     if x == nbr:
> > UnboundLocalError: local variable 'x' referenced before assignment>>> 
> > isPrime(10)
> > False
> > >>> isPrime(11)
>
> > True
>
> > adding x=1 makes it work though:
>
> > def isPrime(nbr):
> >     x=1
> >     for x in range(2, nbr + 1):
> >         if nbr % x == 0:
> >             break
> >     if x == nbr:
> >         return True
> >     else:
> >         return False
>
> > >>> [isPrime(y) for y in range(11)]
>
> > [False, True, True, True, False, True, False, True, False, False,
> > False]
>
> No, it doesn't. You are falsely reporting that 1 is prime.
>
> And instead of making the fake variable x, shouldn't you
> instead test that nbr+1 is greater than 2? Or call it with
> range(3,11) instead of range(11)? x isn't initialized
> because if nbr+1 is <=2, the for loop has an invalid range
> and doesn't even execute.


def isPrime(nbr):
for x in range(2, nbr + 1):
if nbr % x == 0:
break
if x == nbr:
return True
else:
return False

this works for all primes, if i want to not include 1 i just do if
nbr<=1 return false

you are answering the wrong question.


anyway here is a clear one:
def isPrime(nbr):
if nbr < 2:
return False
for x in range(2, nbr + 1):
if nbr % x == 0:
return nbr == x
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How can I check nbr of cores of computer?

[defn noob]

How can I check how many cores my computer has?
Is it possible to do this in a Python-app?
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>> and << operators?

[defn noob]

What does >> and << do?

Googling on them and they are just ignored...

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Generators can only yield ints?

[defn noob]

def letters():
a = xrange(ord('a'), ord('z')+1)
B = xrange(ord('A'), ord('Z')+1)
while True:
yield chr(a)
yield chr(B)


>>> l = letters()
>>> l.next()

Traceback (most recent call last):
  File "", line 1, in 
l.next()
  File "", line 5, in letters
yield chr(a)
TypeError: an integer is required
>>>


Any way to get around this?
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