Today I installed QuantumGIS 1.8 with the osgeo4w-installer - including
python and psycopg2.
Quantum 1.8 works, but many plugins cannot be used because psycopg2
cannot be imported:
When i use the python console in QGIS (or a python console with the
python 2.7 that was installed in C:\osgeo4w\bin) the following error
occures:
import psycopg2
Traceback (most recent call last):
File input, line 1, in module
File C:/osgeo4w/apps/qgis/./python\qgis\utils.py, line 309, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File
C:\osgeo4w\apps\Python27\lib\site-packages\psycopg2\__init__.py,
line 71, in module
from psycopg2._psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
File C:/osgeo4w/apps/qgis/./python\qgis\utils.py, line 309, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
ImportError: DLL load failed: Das Betriebssystem kann %1 nicht ausführen.
The error is also described in :
http://stackoverflow.com/questions/1306367/importerror-dll-load-failed-when-trying-to-import-psycopg2-library
I have a computer with windows 7 64bit with 32bit python (2.6, 2.7)
installed.
I have another Python27 installed in C:\Python27
psycopg2 is working there without any problems.
i tried to install another version of psycopg2 (2.3 from osgeo) but
with the same error.
- however i did not manage to use the windows installer (it installs
psycopg2 always in the normal python folder - not in the python in
osgeo4w).
http://www.stickpeople.com/projects/python/win-psycopg/psycopg2-2.4.5.win32-py2.7-pg9.1.3-release.exe
I tried to change the registry entry for python to redirect it to
c:\osgeo4w\python27 . But the installation fails.
When i try to install psycopg2 form the source (with easy-install oder
C:\osgeo4w\bin\python.exe setup.py install) the following error
occures,when building the _psycopg file:
C:\osgeo4w\bin\psycopg2-2.4.5C:\MinGW\bin\gcc.exe -mno-cygwin -mdll
-O -Wall -DPSYCOPG_DEFAULT_PYDATETIME=1 -DPSYCOPG_VERSION=\2.4.5 (dt
dec pq3 ext)\ -DPG_VERSION_HEX=0x090005 -DPSYCOPG_EXTENSIONS=1
-DPSYCOPG_NEW_BOOLEAN=1 -DHAVE_PQFR
EEMEM=1 -IC:\Python27\include-IC:\Python27\PC -I.
-IC:/PROGRA~2/POSTGR~1/9.0/include
-IC:/PROGRA~2/POSTGR~1/9.0/include/server -c psycopg\psycopgmodule.c
-o build\temp.win32-2.7\Release\psycopg\psycopgmodule.o -O3
-fno-strict-aliasing
cc1.exe: error: unrecognized command line option '-mno-cygwin'
i tried to remove the occurence of -mno-cygwin in
C:\osgeo4w\apps\python27\Lib\distutils\cygwinccompiler.py
as described in
http://stackoverflow.com/questions/9645004/python-mno-cygwin
but that does not help.
If i try to execute the command without -mno-cygwin
C:\osgeo4w\bin\psycopg2-2.4.5C:\MinGW\bin\gcc.exe -mdll -O -Wall
-DPSYCOPG_DEFAULT_PYDATETIME=1 -DPSYCOPG_VERSION=\2.4.5 (dt dec pq3
ext)\ -DPG_VERSION_HEX=0x090005 -DPSYCOPG_EXTENSIONS=1
-DPSYCOPG_NEW_BOOLEAN=1 -DHAVE_PQFR
EEMEM=1 -IC:\Python27\include-IC:\Python27\PC -I.
-IC:/PROGRA~2/POSTGR~1/9.0/include
-IC:/PROGRA~2/POSTGR~1/9.0/include/server -c psycopg\psycopgmodule.c -o
build\temp.win32-2.7\Release\psycopg\psycopgmodule.o -O3
-fno-strict-aliasing
he complains because of a missing python.h file.
I tried to reinstall the osgeo4w-python-core and psycopg2, but the
problem is still there.
Has anyone an idea, what other solutions i could try?
Is there a possibility to use my normal python2.7 installation on
c:\python27 for QuantumGIS?
Thanks in advance for any help,
Max
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