What's the best Python idiom for this C construct? while ((x = next()) != END) { .... } I don't have the ability to recode next(). update: and the answer from seems to be: for x in iter(next, END): .... ...
I want to begin to learn Python, and I've seen that phrase come up here before, but I don't know exactly what it means. I've read some websites on Python scripting, but I don't recall ever seeing that (but I could have just glanced over it). What exactly makes something "pythonian" or "pythonic"? ...
I have some Python code that creates a Calendar object based on parsed VEvent objects from and iCalendar file. The calendar object just has a method that adds events as they get parsed. Now I want to create a factory function that creates a calendar from a file object, path, or URL. I've been using the iCalendar python module, which i...
This is really the first thing that I have written in python. I come from Java background. I don't want to just learn how to program java code with Python syntax. I want to learn how to program in a pythonic paradigm. Could you guys please comment on how I can make the following code more pythonic? from math import sqrt # recursive...
My goal here is to create a very simple template language. At the moment, I'm working on replacing a variable with a value, like this: This input: <%"TITLE"="This Is A Test Variable"%>The Web <%"TITLE"%> Should produce this output: The Web This Is A Test Variable I've got it working. But looking at my code, I'm running multi...
I would like to create a trivial one-off Python object to hold some command-line options. I would like to do something like this: options = ?????? options.VERBOSE = True options.IGNORE_WARNINGS = False # Then, elsewhere in the code... if options.VERBOSE: ... Of course I could use a dictionary, but options.VERBOSE is more readabl...
Do you know any application, the more interesting/useful the better, to introduce a new person to Python language and the Python code style, but not necessarily to OO programing, so as to learn the subtleties and idioms of the language and surrounding community? I'm thinking along the lines of people that has worked with JavaScript, Jav...
I just came across this idiom in some open-source Python, and I choked on my drink. Rather than: if isUp: return "Up" else: return "Down" or even: return "Up" if isUp else "Down" the code read: return isUp and "Up" or "Down" I can see this is the same result, but is this a typical idiom in Python? If so, is it some perf...
Sometimes it seems natural to have a default parameter which is an empty list. Yet Python gives unexpected behavior in these situations. If for example, I have a function: def myFunc(working_list = []): working_list.append("a") print working_list The first time it is called with the default will work, but calls after that w...
I've had some experience with Pygame, but there seems to be a lot of buzz around Pyglet these days. How do these two libraries compare? What would be the advantage of using one over the other, both in features and ease of use? Finally, would you say that one is more Pythonic than the other? ...
I'm checking if two strings a and b are permutations of each other, and I'm wondering what the ideal way to do this is in Python. From the Zen of Python, "There should be one -- and preferably only one -- obvious way to do it," but I see there are at least two ways: sorted(a) == sorted(b) and all(a.count(char) == b.count(char) for ch...
Hi! Is there a pythonic way of reading - say - mixed integer and char input without reading the whole input at once and without worrying about linebreaks? For example I have a file with whitespace-separated data of which I only know that there are x integers, then y chars and then z more integers. I don't want to assume anything about l...
I need to access the crypto functions of OpenSSL to encode Blowfish data in a CBC streams. I've googled and found some Blowfish libraries (hand written) and some OpenSSL wrappers (none of the seem complete.) In the end, I need to access the certain OpenSSL functions, such as the full blowfish.h library of commands. What's the pythonic/r...
I have a Python script which takes as input a list of integers, which I need to work with four integers at a time. Unfortunately, I don't have control of the input, or I'd have it passed in as a list of four-element tuples. Currently, I'm iterating over it this way: for i in xrange(0, len(ints), 4): # dummy op for example code ...
exact duplicate: http://stackoverflow.com/questions/58968/what-defines-pythonian-or-pythonic I have no python experience at all. Help me to understand this term. Please provide code examples and explanations as to what makes a particular sample "pythonic" and why. ...
What I'm looking for is the best way to say, 'If this list is too short, lengthen it to 9 elements and add 'Choice 4', 'Choice 5', etc, as the additional elements. Also, replace any 'None' elements with 'Choice x'.' It is ok to replace "" and 0 too. An example transformation would be ['a','b',None,'c'] to ['a','b','Choice 3','c','Ch...
Not sure that the example (nor the actual usecase) qualifies as NP-Complete, but I'm wondering about the most Pythonic way to do the below assuming that this was the algorithm available. Say you have : class Person: def __init__(self): self.status='unknown' def set(self,value): if value: self.status='happy' else :...
Given a string of a Python class, e.g. 'my_package.my_module.MyClass', what is the best possible way to load it? In other words I am looking for a Class.forName() function in Python. It needs to work on Google App Engine. Preferably this would be a function that accepts the FQN of the class as a string, and returns a reference to the c...
I'm trying to generate the morris sequence in python. My current solution is below, but I feel like I just wrote c in python. Can anyone provide a more pythonic solution? def morris(x): a = ['1', '11'] yield a[0] yield a[1] while len(a) <= x: s = '' count = 1 al = a[-1] for i in range(0,le...
I wrote a twitter application in Python. Following is the code I used for a module where I find if x is following y. This code can be obviously improved upon. A pythonic way to do that? import urllib2 import sys import re import base64 from urlparse import urlparse import simplejson def is_follows(follower, following): theurl = 'h...