python not finding library under django that's found otherwise

Question

I've just successfully installed GeoDjango and all the required libraries. I've set the environment variables and registry keys (yea working under Windows here) and everything works find from the command line.

d:\...\> python
>>> from django.contrib.gis.geos import *
>>> exit()
d:\...\> python manage.py runserver 0.0.0.0
(...)

Now when the server that's being run here encounters the very same line in code it's supposed to execute, it says

WindowsError at /NT/BUAConvex/4DED02804:SQLEXPRESS:44_EU_2011Q2/20187417/
[Error 126] The specified module could not be found

D:\...\views.py in <module>
from django.contrib.gis.geos import * ...

c:\python27\lib\site-packages\django\contrib\gis\geos\__init__.py in <module>
from django.contrib.gis.geos.geometry import GEOSGeometry, wkt_regex, hex_regex ...

c:\python27\lib\site-packages\django\contrib\gis\geos\geometry.py in <module>
from django.contrib.gis.geos.coordseq import GEOSCoordSeq ...

c:\python27\lib\site-packages\django\contrib\gis\geos\coordseq.py in <module>
from django.contrib.gis.geos.libgeos import CS_PTR ...

c:\python27\lib\site-packages\django\contrib\gis\geos\libgeos.py in <module>
lgeos = CDLL(lib_path) ...

c:\python27\lib\ctypes\__init__.py in __init__
            self._handle = _dlopen(self._name, mode) ...

Answer 1

Thanks to @ed. and @g.d.d.c I found the solution. Problem turned up in the Django shell as well. Turns out I had set GEOS_LIBRARY_PATH = 'c:\OSGeo4W' in my Django settings where it should've been 'c:\OSGeo4W\bin'. Calling plain Python obviously ignored those settings and instead relied on the OS-own functionality to find the .dll (which succeeds).