gmane.comp.python.tutor

headers Tiago Katcipis | 17 May 20:16

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Tutor maillist  -  Tutor <at> python.org
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Hi, I'm writing an AI for a board game called Blokus, and I believe
that the quality of the program is going to greatly depend on the
efficiency of the algorithm I use to generate legal moves and rate
them.

I know sort of how I'm going to do this legal move generation, and I
know it is going to require lots of accesses to an array of some kind
which will represent the game board.

I'm fairly new to Python, and I am not sure whether it would be faster
for me to use a Dictionary data type to represent the board
(advantages: indices can be strings or tuples, and the dictionary can
store different types of data as well, so programming would be easier)
or the Numpy array type (don't know much about this, but I have heard
Numpy is faster).

So is Numpy faster for simple array accesses? That would be valuable
and I'd deal with having an integer-indexed integer array if I had to.

Code might look something like this:

for playable_corner in all_playable_corners:
    for piece in all_available_pieces:
        for each_square in piece:
            # if square is not in a legal position, don't add to list
of legal moves

So that if statement would be accessing the board array many many
times. I guess my question is: Is there any way to test Dictionary
access time vs. Numpy array access time?

Thanks,

Adam
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I'm looking for a faster way to do the following problem:

I have an urn with many different colors of marbles in it.  I pull one
out and note the color.  I do not replace it.

For the programming of this, I actually know how many are yellow,
green, etc.  So the way the code works right now is:

import math
...

randindex = math.randint(1,number_of_marbles)
for color in colors:
   if randindex<=marble_count[color]: #we've found what color it will be
       break
   else:                                          #try next color
       randindex -= marble_count[color]
marble_count[color] -= 1
number_of_marbles -= 1
return color

Unfortunately, I have hundreds of thousands of colors, so it spends a
while on this loop.  And I have to keep choosing marbles many times at
different points of the code.

Is there a quicker way to do this?

Thanks,
Joel
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I can't.

>>> import file.py

is all very well if the interpreter knows where file.py is.

I want to do this :

>>> import /directory1/directory2/file.py

Is this not possible ?

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Hi,

Would anyone be able to offer assistance re: using
Guido van Robot to perform pattern recognition (as in
it "sees" a particular pattern (like a 3x5 grid
depiction of the letter "A") and responds
accordingly)? In my example, Guido recognizes a
specific letter by placing down an appropriate amount
of beepers. A = 1 beeper, B = 2, etc.

I'm able to create separate definitions to recognize
specific letters, but my difficulty arises when I try
to make a program so robust that it should be able to
recognize any letter of the alphabet no matter what
order they would be in.

Thanks,

Jill

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Hello,
is there any function/module that allows me to open a directory in the 
default file manager of a operating system?

Here I a piece of code how to open a URL in the default webbrowser:

http://www.python.org/doc/lib/module-webbrowser.html

import webbrowser
myurl = 'http://www.python.org'
webbrowser.open_new_tab(myurl)

I just wanna do the same with a directory.

The function should open Explorer on Windows, Nautilus on Gnome, Thunar 
onn XFCE4, ...

Thanks for your help in advance.

Regards,
Timmie

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hi ,i am working to replace three lines in a httpd.conf file using
regular expression.i am able to change only one among them but while
replacing other i am not geeting good idea to replace all the three
lines just in a single script ,,my script is like

 #!usr/bin/python

import sys
import os
import re
import  string

def replace_file(file,search,replace):
	cregex=re.compile(search)
	for current_line in file:
		if cregex.search(current_line):
			current_line=re.sub(search,replace,current_line)
			print current_line
		else:
			print current_line

def main():
	file =open("/root/Desktop/httpd.conf").readlines()
	replace_file(file,'User apache ' , 'User myuser ')
	#replace_file(file,'Group apache','Group myuser')
	#replace_file(file,DirectoryIndex\ index.html\ index.html.var,DirectoryIndex\ index.html\
index.html.var\ login.html)

if __name__ == '__main__':
        main()

I am running this command to save the output in a temp file then replacing with original httpd.conf.

	can I do this in a single python script that'll change three lines and there should not any need to replace
it.that is the change should
 directly save to the source file......??????????

any help will be appreciated.Thanks

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Best way to define comparison

datetime syntax error for May 8th and 9th 2008??

Dictionaries or Numpy?

quickly pulling marbles out of urns

Re: Getting started with Python

Getting started with Python

Guido van Robot help

Open a directory in the default file manager

(no subject)

Freeze utility

Random module error