python

PyParsing: What does Combine() do?

What is the difference between: foo = TOKEN1 + TOKEN2 and foo = Combine(TOKEN1 + TOKEN2) Thanks. UPDATE: Based on my experimentation, it seems like Combine() is for terminals, where you're trying to build an expression to match on, whereas plain + is for non-terminals. But I'm not sure. ...

PyParsing: Not all tokens passed to setParseAction()

I'm parsing sentences like "CS 2110 or INFO 3300". I would like to output a format like: [[("CS" 2110)], [("INFO", 3300)]] To do this, I thought I could use setParseAction(). However, the print statements in statementParse() suggest that only the last tokens are actually passed: >>> statement.parseString("CS 2110 or INFO 3300") Match...

Is it possible to create a python iterator over pre-defined mutable data?

I might be doing this wrong, if I am, let me know, but I'm curious if the following is possible: I have a class that holds a number of dictionaries, each of which pairs names to a different set of objects of a given class. For example: items = {"ball" : ItemInstance1, "sword" : ItemInstance2} people = {"Jerry" : PersonInstance1, "Bob" ...

problem with hierarchical clustering in Python

I am doing a hierarchical clustering a 2 dimensional matrix by correlation distance metric (i.e. 1 - Pearson correlation). My code is the following (the data is in a variable called "data"): from hcluster import * Y = pdist(data, 'correlation') cluster_type = 'average' Z = linkage(Y, cluster_type) dendrogram(Z) The error I get is: ...

Using custom Qt subclasses in Python

First off: I'm new to both Qt and SWIG. Currently reading documentation for both of these, but this is a time consuming task, so I'm looking for some spoilers. It's good to know up-front whether something just won't work. I'm attempting to formulate a modular architecture for some in-house software. The core components are in C++ and e...

Kill process by name in python

Hello, I'm trying to kill a process (specifically iChat) using python. I know how to use the command: ps -A | grep iChat Then: kill -9 PID However, I'm not exactly sure how to translate these commands over to python. My guess is that it's not very difficult but I just don't know. Any help would be greatly appreciated! ...

How do I split filenames from paths using python?

I have a list of files that look like this: Input /foo/bar/baz/d4dc7c496100e8ce0166e84699b4e267fe652faeb070db18c76669d1c6f69f92.mp4 /foo/baz/bar/60d24a24f19a6b6c1c4734e0f288720c9ce429bc41c2620d32e01e934bfcd344.mp4 /bar/baz/foo/cd53fe086717a9f6fecb1d0567f6d76e93c48d7790c55e83e83dd1c43251e40e.mp4 And I would like to split out the filen...

How do I embed an AppleScript in in a Python script?

I am trying to embed an AppleScript in a Python script. I don't want to have to save the AppleScript as a file and then load it in my Python script. Is there a way to enter the AppleScript as a string in Python and have Python execute the AppleScript? Thanks a bunch. Here is my script: import subprocess import re import os ...

How to send file from C# to apache with mod_wsgi (django) and python?

How to send file from C# to apache with mod_wsgi (django) and python? It will be nice to see code example in both c# (client) and python (server). ...

How to Not Force Login After Users Close Their Browser on gae

...Like Django's session or cookies Does anyone have a simple way of allowing this? ...

PyParsing: Is this correct use of setParseAction()?

I have strings like this: "MSE 2110, 3030, 4102" I would like to output: [("MSE", 2110), ("MSE", 3030), ("MSE", 4102)] This is my way of going about it, although I haven't quite gotten it yet: def makeCourseList(str, location, tokens): print "before: %s" % tokens for index, course_number in enumerate(tokens[1:]): ...

how to show the right word in my code, my code is : os.urandom(64)

My code is: print os.urandom(64) which outputs: > "D:\Python25\pythonw.exe" "D:\zjm_code\a.py" \xd0\xc8=<\xdbD' \xdf\xf0\xb3>\xfc\xf2\x99\x93 =S\xb2\xcd'\xdbD\x8d\xd0\\xbc{&YkD[\xdd\x8b\xbd\x82\x9e\xad\xd5\x90\x90\xdcD9\xbf9.\xeb\x9b>\xef#n\x84 which isn't readable, so I tried this: print os.urandom(64).decode("utf-8") but the...

Django attribute error: 'module' object has no attribute 'is_usable'

Hi, I got the following error when calling the url in Django. It's working before, I guess it's related with some accidental changes I made, but I have no idea what they are. Thanks before for the help, Robert Environment: Request Method: GET Request URL: http://localhost:8000/time/ Django Version: 1.2 Python Version: 2.6.1 Installed...

Trying to provide a global logging function

I typically write my scripts with a structure like s #!/usr/bin/python import stuff def do_things(): print "FOO" def main(): do_things() if __name__ == "__main__": main() The problem I have is I'd like to have a logging function that is defined globally and I"m not really sure how to do this. I tried a decorator functi...

Errors Installing PIL on Mac OS Tiger

I'm trying to install the Python Imaging Library on Mac OS X 10.4, but I get errors. I'm not sure where the error starts, it's just a huge wall of text when executing sudo python setup.py install. But the last few lines are: ... collect2: ld returned 1 exit status lipo: can't open input file: /var/tmp//ccNKvQpP.out (No such file or di...

Coding the Python way

I've just spent the last half semester at Uni learning python. I've really enjoyed it, and was hoping for a few tips on how to write more 'pythonic' code. This is the __init__ class from a recent assignment I did. At the time I wrote it, I was trying to work out how I could re-write this using lambdas, or in a neater, more efficient wa...

small code redundancy within while-loops (doesn't feel clean)

So, in Python (though I think it can be applied to many languages), I find myself with something like this quite often: the_input = raw_input("what to print?\n") while the_input != "quit": print the_input the_input = raw_input("what to print?\n") Maybe I'm being too picky, but I don't like how the line the_input = raw_input("w...

indexing for faster search of lists in a file??

i have a file having around 1 lakh lists and have a another file with again a list of around an average of 50.. I want to compare 2nd item of list in second file with the 2nd element of 1st file and repeat this for each of the 50 lists in 2nd file and get the result of all the matching element. I have written the code for all this,but t...

How to make "int" parse blank strings?

I have a parsing system for fixed-length text records based on a layout table: parse_table = [\ ('name', type, length), .... ('numeric_field', int, 10), # int example ('textc_field', str, 100), # string example ... ] The idea is that given a table for a message type, I just go through the string, and reconstruct a ...

Python: Ignore 'Incorrect padding' error when base64 decoding

I have some data that is base64 encoded that I want to convert back to binary even if there is a padding error in it. If I use base64.decodestring(b64_string) it raises an 'Incorrect padding' error. Is there another way? UPDATE: Thanks for all the feedback. To be honest, all the methods mentioned sounded a bit hit and miss so I deci...