python

png24 to png8 conversion

Hello, I want to convert the input 24 bit PNG image to 8 bit, I have tried using Imagemagick and Python PIL, neither works. for instance: at Imagemagick I try convert console command as such: convert -depth 8 png24image.png png8image.png And here is the way I tried with python: import Image def convert_8bit(src, dest): """ ...

how to get checkbox data using python on gae ..

this is my html : <div id='automail'> <form action = "/admin/mail" method = "get"> auto mail when user :<br/><br/> <div> <input type="checkbox" name="automail" value ="signup">signUp</input><br/> <input type="checkbox" name="automail" value ="login">login</input><br/> </div> <d...

How to use NumPy array with ctypes?

Hi there, I am still writing on a python interface for my c code with ctypes. Today I substituted my file reading function with a python version, which was programmed by somebody else usind NumPy. The 'old' c version was called with a byref(p_data) while p_data=PFloat() (see below). The main function takes the p_data. Old file reading:...

External use of Django DB module failed because of settings module loading

Hi there, I am facing a problem with using Django DB module in an external gateway script. I have the following python file under myproject/myapplication/lib.py #<path>/myproject/myapplication/lib.py from django.db import connection from django.db import settings #SOME METHODS ARE HERE which is using django db module. I need to ...

Find n greatest numbers in a sparse matrix

Hello, I am using sparse matrices as a mean of compressing data, with loss of course, what I do is I create a sparse dictionary from all the values greater than a specified treshold. I'd want my compressed data size to be a variable which my user can choose. My problem is, I have a sparse matrix with alot of near-zero values, and what I...

python - refresh with webbrowser module

Hi I need a code portion to refresh the current page. I get the controller object from webbrowser module and start my webpage. And at a certain point I want to refresh my page inside the python code. According to the documentation at http://docs.python.org/library/webbrowser.html, when I call the open() function of the controller objec...

how to create a lzma file in python

how to create a lzma file in python and add files ...

Reading/writing a list of nested dictionaries to/from a CSV file (Python)

I have a data structure that looks like this: data =[ {'key_1': { 'calc1': 42, 'calc2': 3.142 } }, {'key_2': { 'calc1': 123.4, 'calc2': 1.414 } }, {'key_3': { 'calc1': 2.718, 'calc2': 0.577 } } ] I want to be able to save/and load the data into a CSV file with the following format key, calc1, calc2 <- header key_1, 42, ...

dhtmlxGrid > XML file > Python

Hello, I placed a dhtmlxGrid , an Ajax-enabled JavaScript grid control, in HTML page. By clicking a submit button, a javascript function will generate XML file from the grid (it is called Dataprocessor) and send the XML file to a server-side script on the server. Currently, there are ready-made PHP and Ruby on Rails scripts but I am i...

Need help sorting list of objects by key.

I am unable to get this code to sort a list of objects using either .sort() or sorted(). What am I missing here? P.S. My solution.distance() method could use some cosmetic surgery too if anyone has any suggestions. Thanks! import random import math POPULATION_SIZE = 100 data = [[1, 565.0, 575.0], [2, 25.0, 185.0], ...

How to change wx.aui.AuiManager border size?

I can add several panes to the wx.aui.AuiManager. Because I have the direction set to CENTER, they attach on themselfs and have a litle border between them where I can define the size of two panes. Now, I want to know if I can set the size of that border. Is it possible? Thanks in advance! :D ...

Python subprocess.call weird behavior with multiple calls

I am trying to call remote (ssh) commands using the subprocess.call function like this. import shlex from subprocess import call cmd1='ssh [email protected] mkdir temp' cmd2='scp test.txt [email protected]:temp' call(shlex.split(cmd1)) call(shlex.split(cmd2)) When I call the above, the mkdir does not seem to execute - although the doc...

PyQt4 File select widget

Hi, I want to make a QT4 (using QT designer) dialog, that contains a part where a file has to be selected. Now, I know QFileDialog exists, and I can program something that does what I want. But can I also just do it in QT designer? Is there some way to get a "file select" widget in QT designer? Or, I remember these buttons, having the...

Can you pass multiple paths to the Django runserver --pythonpath directive?

For each of my projects I create an apps directory that holds all the apps I need. Satchmo also has an apps directory. Can I do something like python manage.py runserver --pythonpath=/path/to/my/apps /path/to/satchmo/apps? Is there some separator that it can take? ...

Twisted Web Proxy Help!!

I wrote a Twisted Python HTTP proxy, and keep getting the following Traceback after navigating to a page through the proxy. Traceback (most recent call last): File "C:\ZBrownTechnology\Web Lock\Proxy.py", line 57, in <module> reactor.run() File "C:\Python26\lib\site-packages\twisted\internet\base.py", line 1165, in run self....

Using subprocess to find out when a process ends

I wish to sequentially run some c scripts that fork their own processes (in a new command line window) and give the "Press any key to continue..." when they are completed. Technically, it is a special compiler. It pops up with acommand line window and tells me whether the compile was successful or not. But that command line window for...

How do I get my Python date in the format that I want?

I'm reading a date from an Excel cell in Python (using .Value on the cell)... the result that I get is: 07/06/10 00:00:00 I thought this was a string, and so went about trying to figure out how to convert this to the format I need ("yyyyMMdd", or "20100706" in this example). However, after some playing around I realized that it is not...

Embedded Python - Blocking operations in time module

Hi all, I'm developing my own Python code interpreter using the Python C API, as described in the Python documentation. I've taken a look on the Python source code and I tried to follow the same steps that are carried out in the standard interpreter when executing a py file. These steps (sequence of C API function calls) are basically: ...

Python sorted list search

Are there any Python built-ins or widely used Python libraries to perform a search in a sorted sequence? ...

Regular expression not matching what I think it should...

In python, I'm compiling a regular expression pattern like so: rule_remark_pattern = re.compile('access-list shc-[(in)(out)] [(remark)(extended)].*') I would expect it to match any of the following lines: access-list shc-in remark C883101 Permit http from UPHC outside to Printers inside access-list shc-in extended permit tcp object-g...