I'm rewriting a data-driven legacy application in Python. One of the primary tables is referred to as a "graph table", and does appear to be a directed graph, so I was exploring the NetworkX package to see whether it would make sense to use it for the graph table manipulations, and really implement it as a graph rather than a complicated...
Hello, I'm parsing a source code file, and I want to remove all line comments (i.e. starting with "//") and multi-line comments (i.e. /..../). However, if the multi-line comment has at least one line-break in it (\n), I want the output to have exactly one line break instead. For example, the code: qwe /* 123 456 789 */ asd should ...
Python's getattr() method is useful when you don't know the name of a certain attribute in advance. This functionality would also come in handy in templates, but I've never figured out a way to do it. Is there a built-in tag or non-built-in tag that can perform dynamic attribute lookups? ...
I have a small python script which i use everyday......it basically reads a file and for each line i basically apply different string functions like strip(), replace() etc....im constanstly editing the file and commenting to change the functions. Depending on the file I'm dealing with, I use different functions. For example I got a file ...
I'm looking for a filter that turns a datetime instance into 'x Days' or 'x years y months' format (as on SO). Suggestions? Am I overlooking something very obvious? ...
I need to get a line count of a large file (hundreds of thousands of lines) in python. What is the most efficient way both memory- and time-wise? At the moment I do: def file_len(fname): with open(fname) as f: for i, l in enumerate(f): pass return i + 1 is it possible to do any better? ...
How can use Python2.5 with to write scripts in vim? I'm using vim 7.2 and have Python 2.5. Vim 7.2 seem to be linked with Python 2.4 Do I have to compile from source? ...
Why does my code print the lines gray instead of black? import wx class MyFrame(wx.Frame): def __init__(self,*args,**kwargs): wx.Frame.__init__(self,*args,**kwargs) self.panel=wx.Panel(self,-1,size=(1000,1000)) self.Bind(wx.EVT_PAINT, self.on_paint) self.Bind(wx.EVT_SIZE, self.on_size) self....
I would like to emulate the pass-by-value behaviour in python. In other words, I would like to make absolutely sure that the function I write do not modify user supplied data. One possible way is to use deep copy: from copy import deepcopy def f(data): data = deepcopy(data) #do stuff is there more efficient or more pythonic ...
Hi, I often do vector addition of Python lists. Example: I have two lists like these: a = [0.0, 1.0, 2.0] b = [3.0, 4.0, 5.0] I now want to add b to a to get the result a = [3.0, 5.0, 7.0]. Usually I end up doing like this: a[0] += b[0] a[1] += b[1] a[2] += b[2] Is there some efficient, standard way to do this with less typing? ...
Hello, I have timestamp in milliseconds from 1970. I would like to convert it to a human readable date in python. I don't might losing some precision if it comes to that. How should I do that ? The following give ValueError: timestamp out of range for platform time_t on Linux 32bit #!/usr/bin/env python from datetime import date prin...
Do you know any library that will help doing that? I would write a function that prints the differences between two multiline strings in the unified diff format. Something like that: def print_differences(string1, string2): """ Prints the comparison of string1 to string2 as unified diff format. """ ??? An usage exampl...
It's not uncommon to see Python libraries that expose a universal "opener" function, that accept as their primary argument a string that could either represent a local filename (which it will open and operate on), a URL(which it will download and operate on), or data(which it will operate on). Here's an example from Feedparser. My ques...
Is there an easy way to call Python objects from C#, that is without any COM mess? ...
I am developing a website using Google App engine and Django 1.0 (app-engine-patch) a major part of my program has to run in the background and change local data and also post to a remote url... can sumone suggest an effective way of doin this... ...
I want to calculate the sum of 1/1 + 1/2 + 1/3 + ... + 1/30 I run the code unsuccessfully import decimal import math var=decimal.Decimal(1/i) for i in range(1,31): print(sum(var)) I get the error 'Decimal' object is not iterable How can you make the iterable function in Python? ...
I know similar questions have been asked before but they don't really have the information I'm looking for - I'm not asking about the mechanics of how to generate unit tests, but whether it's a good idea. I've written a module in Python which contains objects representing physical constants and units of measurement. A lot of the units ...
My problem is similar to http://stackoverflow.com/questions/497233/pythons-os-path-choking-on-hebrew-filenames however, I don't know the original encoding of the filename I need to rename (unlike the other post he knew it was Hebrew originally). I was doing data recovery for a client and copied over the files to my XP SP3 machine, and ...
My question is related to this one: Python tool that builds a dependency diagram for methods of a class. After not finding any tools I wrote a quick hack myself: I've used the compiler module, I've parsed the source code into an Abstract Source Tree and I've walked it to collect dependencies between class methods. My script generated an...
I'm wanting to use an NSOpenPanel for an application I'm designing. Here's what I have so far: @objc.IBAction def ShowOpenPanel_(self, sender): self.panel = NSOpenPanel.openPanel() self.panel.setCanChooseFiles_(False) self.panel.setCanChooseDirectories_(True) NSLog(u'Starting OpenPanel') self.panel.beginForDirectory...