python

Some jQuery-powered features not working in Chrome

I'm using a jCarouselLite plugin for creating two image galleries on the main page of my Django-powered site. The code of elements with navigation arrows is generating dynamically like this: $(document).ready(function () { $('[jq\\:corner]').each(function(index, item) { item = $(item); item.corner(item.attr('jq:corner'))...

(Python/Django): How do I keep my production db in sync (scheme and data) and with dev pc db?

Hello, newbie here. I have a local Postgres database which will be filled with data (daily) on my local development machine. What is a good solution to transfer/sync/mirror this data to a production Postgres database. For what it's worth I'm developing in Python using Django. Thanks! ...

How do I have unsigned fields in Django?

class MyTable(models.Model): lat = models.FloatField(blank=True) long = models.FloatField(blank=True) How do I make them unsigned? Able to accept negative . ...

Exception Handling in google app engine

i am raising exception using if UserId == '' and Password == '': raise Exception.MyException , "wrong userId or password" but i want print the error message on same page class MyException(Exception): def __init__(self,msg): Exception.__init__(self,msg) ...

django views getid

class host(models.Model): emp = models.ForeignKey(getname) def __unicode__(self): return self.topic In views there is the code as, real =[] for emp in my_emp: real.append(host.objects.filter(emp=emp.id)) This above results only the values of emp,My question is that how to get the ids along with emp val...

method of iterating over sqlalchemy model's defined columns?

I've been trying to figure out how to iterate over the list of columns defined in a SqlAlchemy model. I want it for writing some serialization and copy methods to a couple of models. I can't just iterate over the obj.dict since it contains a lot of SA specific items. Anyone know of a way to just get the id, and desc names from the foll...

OpenType programming

Hi all Recently i asked two questions (1 and 2) about using OpenType features in programs written by python and .net languages, but didn't get an answer. i realized there is no way to change text rendering engines of operating systems, or force them to use OpenType. so now want to implement my own. such a program that: provides a text ...

Uploading multiple files with size restriction in Javascript

Can anybody tell me how i can upload multiple files with size restriction in javascript. ...

Using urllib2 with SOCKS proxy

Hello. Is it possible to fetch pages with urllib2 through a SOCKS proxy on a one socks server per opener basic? I've seen the solution using setdefaultproxy method, but I need to have different socks in different openers. So there is SocksiPy library, which works great, but it has to be used this way: import socks import socket socket....

Sans-serif math with latex in matplotlib

The following script: import matplotlib matplotlib.use('Agg') import matplotlib.pyplot as mpl mpl.rc('font', family='sans-serif') mpl.rc('text', usetex=True) fig = mpl.figure() ax = fig.add_subplot(1,1,1) ax.text(0.2,0.5,r"Math font: $451^\circ$") ax.text(0.2,0.7,r"Normal font (except for degree symbol): 451$^\circ$") fig.savefig('te...

Regex to match the first file in a rar archive file set in Python

I need to uncompress all the files in a directory and for this I need to find the first file in the set. I'm currently doing this using a bunch of if statements and loops. Can i do this this using regex? Here's a list of files that i need to match: yes.rar yes.part1.rar yes.part01.rar yes.part001.rar yes.r01 yes.r001 These should NO...

Is it possible to temporarily disable Python's string interpolation?

I have a python logger set up, using python's logging module. I want to store the string I'm using with the logging Formatter object in a configuration file using the ConfigParser module. The format string is stored in a dictionary of settings in a separate file that handles the reading and writing of the config file. The problem I ha...

django: grouping in an order_by query?

Hi all, I want to allocate rankings to users, based on a points field. Easy enough you'd think with an order_by query. But how do I deal with the situation where two users have the same number of points and need to share the same ranking? Should I use annotate to find users with the same number of points? My current code, and a pseud...

Sunrise / set calculations

I'm trying to calculate the sunset / rise times using python based on the link provided below. My results done through excel and python do not match the real values. Any ideas on what I could be doing wrong? My Excel sheet can be found under .. http://transpotools.com/sun_time.xls # Created on 2010-03-28 # @author: dassouki # @source...

Changes to multiple entities within a single transaction

Hy, I am trying to make changes to multiple entities within a single transaction in app engine platform. As I understand in order to succeed doing so, App Engine needs to know in advance which entities will be updated together, so it knows to store them in a way that supports transactions. And therefore, user must declare that an entity...

python mysqldb string formatting

How do I do this correctly: I want to do a query like this: query = """SELECT * FROM sometable order by %s %s limit %s, %s;""" conn = app_globals.pool.connection() cur = conn.cursor() cur.execute(query, (sortname, sortorder, limit1, limit2) ) results = cur.fetchall() All works fine but the o...

virtualenv does not copy standard modules like shutil and urllib2

When I create a new virtualenv, virtualenv .virtualenvs/my_env, there is only a subset of the standard python modules copied/linked to the new virtualenv. For example, when I do ls -l in .virtualenvs/my_env/lib/python2.6, I see: ... ... os.py -> /usr/lib/python2.6/os.py ... os.pyc -> /usr/lib/python2.6/os.pyc but modules like shutil ...

Rearranging a sequence

I'm have trouble rearranging sequences so the amount of letters in the given original sequence are the same in the random generated sequences. For example: If i have a string 'AAAC' I need that string rearranged randomly so the amount of A's and C's are the same. ...

Python - compare nested lists and append matches to new list?

Hi, I wish to compare to nested lists of unequal length. I am interested only in a match between the first element of each sub list. Should a match exist, I wish to add the match to another list for subsequent transformation into a tab delimited file. Here is an example of what I am working with: x = [['1', 'a', 'b'], ['2', 'c', 'd']] ...

Django says the "id may not be NULL" but why is it?

I'm going crazy today. I just tried to insert a new record and it threw back a "post_blogpost.id may not be NULL" error. Here's my model: class BlogPost(models.Model): title = models.CharField(max_length=100) slug = models.SlugField(max_length=100) who = models.ForeignKey(User, default=1) when = models.DateTi...