Python Path Environment not correctly set on fresh install

[Wolfgang Meinolf]

Steps to reproduce the issue:

(1) Install QGIS using OSGeo4W Installer with admin rights, easy install and select QGIS, Grass and Saga.
(2) Start installer again and add python libs rtree and geopandas. Confirm, to also install dependent packages, which include fiona.
(3) Start QGIS
(4) Start pyqgis Console
(5) Enter "import geopandas", first error ist displayed
(6) Enter "import geopandas" again, different error ist displayed

Message in QGIS PY console:

# Python-Konsole # Verwende iface für den Zugriff auf die QGIS API-Schnittstelle oder help(iface) für weitere Informationen # Sicherheitswarnung: Die Eingabe von Befehlen aus einer nicht vertrauenswürdigen Quelle kann den Computer beschädigen import geopandas Traceback (most recent call last):

File "C:\OSGeo4W\apps\Python39\lib\code.py", line 90, in runcode

exec(code, self.locals)

File "<input>", line 1, in <module> File "C:\OSGeo4W/apps/qgis/./python\qgis\utils.py", line 888, in _import

mod = _builtin_import(name, globals, locals, fromlist, level)

File "C:\OSGeo4W\apps\Python39\lib\site-packages\geopandas\init.py", line 7, in <module>

from geopandas.io.file import _read_file as read_file # noqa

File "C:\OSGeo4W/apps/qgis/./python\qgis\utils.py", line 888, in _import

mod = _builtin_import(name, globals, locals, fromlist, level)

File "C:\OSGeo4W\apps\Python39\lib\site-packages\geopandas\io\file.py", line 7, in <module>

import fiona

File "C:\OSGeo4W/apps/qgis/./python\qgis\utils.py", line 888, in _import

mod = _builtin_import(name, globals, locals, fromlist, level)

File "C:\OSGeo4W\apps\Python39\lib\site-packages\fiona\init.py", line 86, in <module>

from fiona.collection import BytesCollection, Collection

File "C:\OSGeo4W/apps/qgis/./python\qgis\utils.py", line 888, in _import

mod = _builtin_import(name, globals, locals, fromlist, level)

File "C:\OSGeo4W\apps\Python39\lib\site-packages\fiona\collection.py", line 11, in <module>

from fiona.ogrext import Iterator, ItemsIterator, KeysIterator

File "C:\OSGeo4W/apps/qgis/./python\qgis\utils.py", line 888, in _import

mod = _builtin_import(name, globals, locals, fromlist, level)

ImportError: DLL load failed while importing ogrext: Das angegebene Modul wurde nicht gefunden.

Workaround after some investigation:

Execute manually the python-qgis.bat located in OSGeo4W\bin folder. Close window with exit().

Alternatively also "set PYTHONPATH=%OSGEO4W_ROOT%\apps\qgis\python;%PYTHONPATH%" entered in OSGeo4W Shell seems to help.

[jef]

duplicate of #718