In Python, how to check if a string only contains certain characters? I need to check a string containing only a..z, 0..9, and . (period) and no other character. I could iterate over each character and check the character is a..z or 0..9, or . but that would be slow. I am not clear now how to do it with a regular expression. Is this ...
Hi, I wonder what is better to do: d = {'a': 1, 'b': 2} 'a' in d True or: d = {'a': 1, 'b': 2} d.has_key('a') True ...
I currently have a few unit tests which share a common set of tests. Here's an example: import unittest class BaseTest(unittest.TestCase): def testCommon(self): print 'Calling BaseTest:testCommon' value = 5 self.assertEquals(value, 5) class SubTest1(BaseTest): def testSub1(self): print 'Calli...
I have made a simple IM client in both Python and C#, using a few different XMPP libraries for each. They work very well as simple autoresponders, or trivial bots, but when I turn them into chat rooms (ie, a message gets reflected to many other JIDs), I suddenly start getting 503 service-unavailable responses from the Google talk server...
I just got Panda3D for the first time. I deleted the included Python version. In my Python dir, I put a file panda.pth that looks like this: C:\Panda3D-1.6.2 C:\Panda3D-1.6.2\bin But when I run import direct.directbase.DirectStart, I get: Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> import direct.d...
I have the following code: import string def translate_non_alphanumerics(to_translate, translate_to='_'): not_letters_or_digits = u'!"#%\'()*+,-./:;<=>?@[\]^_`{|}~' translate_table = string.maketrans(not_letters_or_digits, translate_to *len(not_lette...
Jinja2 and Mako are both apparently pretty fast. How do these compare to (the less featured but probably good enough for what I'm doing) string.Template ? ...
Hi, I have a simple model like this one: class Artist(models.Model): surname = models.CharField(max_length=200) name = models.CharField(max_length=200, blank=True) slug = models.SlugField(unique=True) photo = models.ImageField(upload_to='artists', blank=True) bio = models.TextField(blank=True) class Images(models.Model...
I have a simple python program that I'd like to daemonize. Since the point of my doing this is not to demonstrate mastery over the spawn, fork, disconnect , etc, I'd like to find a module that would make it quick and simple for me. I've been looking in the std lib, but can not seem to find anything. Is there? ...
Hello Assume I have 2 time intervals,such as 16:30 - 20:00 AND 15:00 - 19:00, I need to find the total time between these two intervals so the result is 5 hours (I add both intervals and subtract the intersecting interval), how can I write a generic function which also deals with all cases such as one interval inside other(so the result ...
How would I parse the following input (either going line by line or via regex... or combination of both): Table[ Row[ C_ID[Data:12345.0][Sec:12345.0][Type:Double] F_ID[Data:17660][Sec:17660][Type:Long] NAME[Data:Mike Jones][Sec:Mike Jones][Type:String] ] Row[ C_ID[Data:2560.0][Sec:2560.0][Type:Double]...
Let's say I create a table like this: table = Table('mytable', metadata, Column('a', Integer, primary_key=True), Column('b', Integer, primary_key=True), ) table.create() Is it guaranteed that the primary key will be (a,b) and not (b,a)? ...
Is there a way to generate a hash-like ID in for objects in python that is solely based on the objects' attribute values? For example, class test: def __init__(self, name): self.name = name obj1 = test('a') obj2 = test('a') hash1 = magicHash(obj1) hash2 = magicHash(obj2) What I'm looking for is something where hash1 ==...
I am writing a python script that will be doing some processing on text files. As part of that process, i need to import each line of the tab-separated file into a local MS SQL Server (2008) table. I am using pyodbc and I know how to do this. However, I have a question about the best way to execute it. I will be looping through the f...
Currently I'm in the process of moving a performance bottleneck in my python code to c, to investigate peformance effects. This code will run a simulation, and report back the results to python via ctypes. However, I'm having problems getting my types to match up correctly. Although I'm looking to solve this particular problem, I'm also...
I want to program a virtual file system in Windows with Python. That is, a program in Python whose interface is actually an "explorer windows". You can create & manipulate file-like objects but instead of being created in the hard disk as regular files they are managed by my program and, say, stored remotely, or encrypted or compressed...
I found the platform module but it says it returns 'Windows' and it's returning 'Microsoft' on my machine. I notice in another thread here on stackoverflow it returns 'Vista' sometimes. So, the question is, how do implemement? if isWindows(): ... In a forward compatible way? If I have to check for things like 'Vista' then it will b...
The goal is to create a mock class which behaves like a db resultset. So for example, if a database query returns, using a dict expression, {'ab':100, 'cd':200}, then I would to see >>> dummy.ab 100 So, at the beginning I thought I maybe able to do it this way ks = ['ab', 'cd'] vs = [12, 34] class C(dict): def __init__(self, ks...
I need as much knowledge as a college graduate! What books should I read? If you had to study PHP, Java, Ruby or Python, I'm even more interested in your answer. ...
Hi, I have a text file which looks like this: blah blah foo1 bar1 foo1 bar2 foo1 bar3 foo2 bar4 foo2 bar5 blah blah Now I want to insert 'foo bar' between 'foo1 bar3' and 'foo2 bar4'. This is how I did it: import shutil txt = '1.txt' tmptxt = '1.txt.tmp' with open(tmptxt, 'w') as outfile: with open(txt, 'r') as infile: ...