Generators can only yield ints?

2008-08-22 Thread 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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>> and << operators?

2008-08-22 Thread defn noob 
What does >> and << do?

Googling on them and they are just ignored...

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How can I check nbr of cores of computer?

2008-07-29 Thread 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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Re: isPrime works but UnBoundLocalError when mapping on list

2008-07-15 Thread 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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isPrime works but UnBoundLocalError when mapping on list

2008-07-15 Thread 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: Not necessarily related to python Web Crawlers

2008-07-05 Thread 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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Re: site-packages, unzipepd there but import fails

2008-07-03 Thread 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: manipulating movie files with Python

2008-07-03 Thread 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

2008-07-03 Thread defn noob 
and yes it is parallel python.

and windows vista.

and the python GUI shell.
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Re: site-packages, unzipepd there but import fails

2008-07-03 Thread 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

2008-07-03 Thread 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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site-packages, unzipepd there but import fails

2008-07-03 Thread 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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PIL(Py Image lib), show() not showing picture...

2008-07-03 Thread 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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Re: Run interpreter in emacs?

2008-07-02 Thread 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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Re: Most efficient way to get pixelcolors of an image?

2008-07-02 Thread 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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Run interpreter in emacs?

2008-07-02 Thread 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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Most efficient way to get pixelcolors of an image?

2008-07-02 Thread 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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tkinter, loading image error, TclError: couldn't recognize data in image file "C:/users/me/desktop/images/blob4.jpg"

2008-06-29 Thread 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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Re: Pygame, how to show window without loop? no loop=popupand close...

2008-06-28 Thread 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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Re: Pygame, how to show window without loop? no loop=popupand close...

2008-06-27 Thread defn noob 
right. im an idiot anyway. i can just draw the lines before entering
the loop, problem solved...
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Pygame, how to show window without loop? no loop=popupand close...

2008-06-27 Thread 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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How to "rebind" py2.5.1 to run from comprompt after uninstalling py3.0?

2008-06-26 Thread 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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Re: recursion in Class-methods?

2008-06-26 Thread 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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Re: recursion in Class-methods?

2008-06-26 Thread 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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