My Python & co. stuff

Qt Creator 1.1.3 extremely slow on Windows

Michał — Tue, 08 Nov 2011 10:06:36 +0000

Qt Creator from Qt SDK 1.1.3 was very slow for me.

My setup? VAIO equipped with i5 + 8 GB RAM + 500GB of Seagate Momentus XT.

Symptoms?

Qt Creator started up in about minute. During that time, it didn’t utilize any of CPU (0-1%) and steadily grown in memory from about 50MB up to 80MB
typing anything in Options search box caused the whole program to hang
clicking “Analyzer” or “Version control systems” in options… yes, you guessed it. Hang.

The whole situation looked like a single false click – and I am doomed to wait for around 30 seconds until it starts working again.

Antivirus? Turned off. Didn’t help.

Solution? Yes, I found it. This is my path:
C:\Users\dotz\Desktop>echo %PATH% C:\Program Files (x86)\AMD APP\bin\x86_64;C:\Program Files (x86)\AMD APP\bin\x86;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\ActiveState Komodo IDE 6\;C:\Program Files (x86)\ActiveState Komodo Edit 6\;C:\GTK\bin;C:\Program Files (x86)\PC Connectivity Solution\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\WIDCOMM\Bluetooth Software\;C:\Program Files\WIDCOMM\Bluetooth Software\syswow64;\;C:\Program Files (x86)\Sony\VAIO Startup Setting Tool;c:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Calibre2\;C:\Program Files (x86)\Common Files\Acronis\SnapAPI\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\TortoiseHg\;C:\Program Files (x86)\Bazaar;C:\Program Files (x86)\VisualSVN\bin;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files (x86)\Nmap;c:\python27;c:\python27\scripts;c:\gnuwin32\bin;c:\Program Files (x86)\PuTTY
As you can see, I have GnuWin32 in it and a few version control systems (TortoiseSVN, for example). I have no idea which caused Qt Creator to lag. Instead, I created a simple batch file to start it up, like this:

@echo off
set PATH=c:\windows;c:\windows\system32
start c:\qtsdk\QtCreator\bin\qtcreator.exe

Qt Creator starts quickly and works fast.

Are you affected by this bug too? You can comment on the bug report page I created.

Update: Solved. The offending path entry?



set PATH=\

Pyglet: set window as “always on top” (topmost) on win32

Michał — Wed, 23 Mar 2011 21:55:21 +0000

Short snippet for settings window as topmost in Pyglet on win32 platform:

    from pyglet.window.win32 import _user32
    from pyglet.window.win32.constants import *

    def set_topmost(window):
        _user32.SetWindowPos(
            window._hwnd, HWND_TOPMOST, 0, 0, 0, 0,
            SWP_NOMOVE | SWP_NOSIZE)

Test Django application without creating a project

Michał — Fri, 11 Mar 2011 01:28:03 +0000

… and settings.py, and urls.py, and so on. Customize as you like.

from django.conf import settings
from django.core import management

MY_APP = '' # Your app name here
if not MY_APP_NAME:
    import sys
    MY_APP_NAME = sys.argv[1]

settings.configure(
    DEBUG=True, 
    TEMPLATE_DEBUG=True,
    INSTALLED_APPS = [MY_APP],
    DATABASES = {
        'default': {
            'ENGINE':'django.db.backends.sqlite3',
            'NAME': ':memory:',
            }
        }
    )

management.call_command('test', MY_APP)

X11 forwarding + FreeBSD = no DISPLAY variable?

Michał — Sat, 18 Dec 2010 22:24:01 +0000

No DISPLAY variable on FreeBSD (or anything else) when you use SSH with X11Forwarding?

Install xauth package.

flowplayer not working?

Michał — Tue, 03 Aug 2010 23:34:53 +0000

flowplayer working from time to time?

flowplayer black window problem?

flowplayer shows black window sometimes?

flowplayer sometimes not working?

Enough Google feeding. The solution is simple and not as obvious.

Make sure you do not serve SWF files gzipped (server-side, by Apache’s mod_gzip for example).

I already wasted 3 hours for this.

django-emailtemplates

Michał — Tue, 03 Aug 2010 20:59:24 +0000

Would you like to send an e-mail with Django? Would you like to use an admin-editable template, which is stored in the db? Well, here’s a small code snippet for you : http://code.google.com/p/django-emailtemplates/

django-pgsql-interval-field – more backends, anyone?

Michał — Sat, 31 Jul 2010 23:23:00 +0000

I am trying to add more backends support for django-pgsql-interval-field . Unfortunatley, as my current work involves PostgreSQL-based Django application, I am unable to test on anything else, than PostgreSQL. Anybody interested in helping me with this project?

Dojango + dojo.DataGrid = dojango-datable

Michał — Sun, 25 Jul 2010 12:24:06 +0000

I’d like to announce my new, simple project for Dojango – dojango-datable, available here: http://code.google.com/p/dojango-datable/

This project allows you to create a definition of a table (in Python). Then, by adding 3 simple tags to your HTML template, you can render a pretty dojo.DataGrid table. Then, by chaning the request’s GET parameters, you can generate XLS or CSV file with the data.

Patches welcome.

Django, PostgreSQL and INTERVAL (IntervalField) – again

Michał — Sun, 25 Jul 2010 12:21:56 +0000

Please have a look at http://code.google.com/p/django-pgsql-interval-field/ if you are using PostgreSQL with Django and want to implement INTERVAL fields. No bigints, no fancy timedelta-to-seconds conversion, just plain old simple PostgreSQL’s native INTERVAL type. Isn’t this cool?

I already use this simple implementation in a commercial setting and it does work pretty well.

Problems? Feel free to send me a patch.

float > Decimal

Michał — Sun, 25 Oct 2009 15:30:28 +0000

Another Python gotcha?

>>> a
12.878
>>> b
Decimal('15.0')
>>> a > b
True
>>> type(a)

>>> type(b)

>>> 1.0 > Decimal('1.0')
True
>>> 0.0 > Decimal('0.0')
True

>>> 1.0 > Decimal('1.0')
True
>>> 0.0 > Decimal('0.0')
True