python

Multiple, Simultaneous Factories and Protocols in Twisted: Same Service, Different Ports

Greetings, Forum. I'm working on a program in Python that uses Twisted to manage networking. The basis of this program is a TCP service that is to listen for connections on multiple ports. However, instead of using one Twisted factory to handle a protocol object for each port, I am trying to use a separate factory for each port. The ...

How should I rewrite my code to make it amenable to unit testing?

I've been trying to get started with unit-testing while working on a little cli program. My program basically parses the command line arguments and options, and decides which function to call. Each of the functions performs some operation on a database. So, for instance, I might have a create function: def create(self, opts, args): ...

Python Random Question

Good Day, I am using Python 2.6 and am trying to run a simple random number generator program (random.py): import random for i in range(5): # random float: 0.0 <= number < 1.0 print random.random(), # random float: 10 <= number < 20 print random.uniform(10, 20), # random integer: 100 <= number <= 1000 print ...

Python urllib.urlopen IOError

So I have the following lines of code in a function sock = urllib.urlopen(url) html = sock.read() sock.close() and they work fine when I call the function by hand. However, when I call the function in a loop (using the same urls as earlier) I get the following error: > Traceback (most recent call last): File "./headlines.py", lin...

what does leading '\x' mean in a python string '\xaa'

what is difference between 'aa' and '\xaa' and which chapter of python documentation will cover this topic? thanks in advance. ...

scrapy - python question

Hi.. Maybe not the correct place to post. But, I'm going to try anyway! I've got a couple of test python parsing scripts that I created. They work enough for me to test what I'm working on. However, I recently came across the python framework, Scrapy, which is used for web scraping. My app runs in a distributed process, across a test...

How can I call python module inside versioned package folder?

I need write python codes which run inside a host application. The python codes should be deployed under a specific folder of the host application. I must put my entry python module under the root of the specific folder. And I want put all my other python codes and c/c++ dll under a sub folder, I prefer to name the sub folder like XXX-1....

Sqlalchemy enumeration/type matching?

how do i do enumeration in sqlachemy? im using pylons if it matters. i also want to have in code to create different object depends on the enumeration, with the same parameters, but different object class. ...

How to install python package without copy everything into lib/site-packages?

I want to develop a common python package, I got other packages depends on it. For example: packageA/ packageB/ packageC/ commonPackage/ packageA, packageB and packageC can all be executed directly, but they are all depend on commonPackage. I want to install the commonPackage into lib/site-packages, but I don't want it copys the so...

Testing for the existence of a field in a class

Hi, i have a quick question. I have a 2D array that stores an instance of a class. The elements of the array are assigned a particular class based on a text file that is read earlier in the program. Since i do not know without looking in the file what class is stored at a particular element i could refer to a field that doesn't exist at ...

How can I view and print PDFs in Python?

Is there a GPL or less restrictive (preferred LGPL) library to view & print PDFs? I'm using PyQt, maybe there's a possibility to render PDFs using it? ...

Multiple counters in a single for loop : Python

Is it possible in Python to run multiple counters in a single for loop as in C/C++? I would want something like -- for i,j in x,range(0,len(x)): I know Python interpretes this differently and why, but I would need to run two loop counters concurrently in a single for...? Thanks, Sayan ...

Django BigInteger auto-increment field as primary key?

Hi all, I'm currently building a project which involves a lot of collective intelligence. Every user visiting the web site gets created a unique profile and their data is later used to calculate best matches for themselves and other users. By default, Django creates an INT(11) id field to handle models primary keys. I'm concerned with ...

Getting and trapping HTTP response using Mechanize in Python

I am trying to get the response codes from Mechanize in python. While I am able to get a 200 status code anything else isn't returned (404 throws and exception and 30x is ignored). Is there a way to get the original status code? Thanks ...

Log into Launchpad from python script

How can I log into my Launchpad account in a python script? Any sample code would be appreciated. The login url is https://launchpad.net/+login and then redirect to something like https://login.launchpad.net/fJLVSRbxPfKTpVDr/+decide Thanks in advance! ...

Match HTML tags in two strings using regex in Python

I want to verify that the HTML tags present in a source string are also present in a target string. For example: >> source = '<em>Hello</em><label>What's your name</label>' >> verify_target(’<em>Hi</em><label>My name is Jim</label>') True >> verify_target('<label>My name is Jim</label><em>Hi</em>') True >> verify_target('<em>Hi<label>M...

How can I get mounted name and (Drive letter too) on Windows using python

I am using Daemon tool to mount an ISO image on Windows XP machine.I do mount using Daemon command (daemon.exe -mount 0,iso_path). Above command will mount ISO image to device number. In my case I have 4 partition (C,D,E,F) and G for DVD/CD-RW. Now what happen, ISO gets mounted to drive letter 'H:' with name (as defined while creating I...

Right clicking on QHeaderView inside of QTreeView

I've written a descendant of QTreeView with multiple columns. I want to create a popup menu that appears whe nthe user right-clicks over the column headers. I have tried catching signals from QTreeView for this, but QTreeView doesn't seem to emit signals on the headers. QTreeView.header() does. I therefore believe I must either: 1: conne...

How to generate random number with the specific length in python

Let say I need a 3 digit number, so it would be something like: >>> random(3) 563 or >>> random(5) 26748 >> random(2) 56 ...

Open Python shell through SSH

I'm using this tool to set up a ssh server on Windows. I'm trying to open the standard Python shell through a remote ssh connection but I simply can't get it to work. If I type 'python' in my ssh command line nothing happens, it just seems to wait for more input. My server machine however, shows a new python process running after I do th...