Bug report #18413
Incorrect Python ver. with GDAL Merge tool in QGIS 3
| Status: | Closed | ||
|---|---|---|---|
| Priority: | High | ||
| Assignee: |  Joe Krienert | ||
| Category: | Processing/GDAL | ||
| Affected QGIS version: | 3.0.0 | Regression?: | Yes |
| Operating System: | Windows 10 64bit | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | up/downstream |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 26302 |
Description
Used OSGeo4W64 installer for QGIS 3 and friends. Made sure GDAL libs were included.
When running GDAL Merge tool an error is raised similar to #17298
Adding...
python --version
... to the gdal_merge.bat indicates it is trying to use 2.7.5.
Related issues
History
#1
Updated by Joe Krienert over 6 years ago
Error output:
2018-03-11T19:56:08 INFO cmd.exe /C gdal_merge.bat -pct -ot Float32 -of GTiff -o "C:/Users/Joe M. Krienert/Desktop/Output.tif" C:/Users/Joe M. Krienert/Desktop/ned03m37089a1.tif C:/Users/Joe M. Krienert/Desktop/ned03m37089b2.tif
2018-03-11T19:56:08 INFO GDAL execution console output
Python 2.7.5
File "C:\OSGEO4~1\apps\Python36\lib\site.py", line 177
file=sys.stderr)
^
SyntaxError: invalid syntax
#2
Updated by Giovanni Manghi over 6 years ago
- Category changed from GDAL Tools to Processing/GDAL
- Status changed from Open to Feedback
- Regression? changed from No to Yes
So the error does not seems related to the python version, right?
#3
Updated by Joe Krienert over 6 years ago
Should GDAL be using Python version 3.6 in QGIS 3? If so, then the Python version might be the problem. If not, then there might be something astray in the basic OSGeo4W64 installer?
#4
Updated by Giovanni Manghi over 6 years ago
Joe Krienert wrote:
Should GDAL be using Python version 3.6 in QGIS 3? If so, then the Python version might be the problem. If not, then there might be something astray in the basic OSGeo4W64 installer?
yes, qgis 3 uses python 3.
#5
Updated by Joe Krienert over 6 years ago
When opening the Python terminal plugin in QGIS 3 desktop and import/calling print (sys.version), the ver. stated is Python 3.
Could the GDAL merge error be associated with conflicting syntax of attempting to run Python 3 commands in a Python 2.7 environment?
#6
Updated by Joe Krienert over 6 years ago
Python 2.7.5
File "C:\OSGEO4~1\apps\Python36\lib\site.py", line 177
file=sys.stderr)
^
Syntax Error: invalid syntax
Does this code snippet from the GDAL merge tool log suggest a conflict between the library (Python36) and active Python version (2.7.5)?
Seems anomolous that the Python plugin terminal tells Python 3 as the active version, but the processing tool call to GDAL states ver 2.7.5.
Does GDAL not support Python 3?
#7
Updated by Joe Krienert over 6 years ago
This test suggest that GDAL is switching the active python version from v. 3.6 to 2.7.
From a freshly opened (as admin) OSGeo4W shell...
Check the current ver. of Python in use:
C:\Windows\System32>python --version Python 2.7.5
Oddly set to ver. 2.7.5, update to ver. 3 environment:
C:\Windows\System32>gdal-dev-py3-env C:\Windows\System32>call gdal-dev-env.bat C:\Windows\System32>SET GDAL_DATA=C:\OSGEO4~1\apps\gdal-dev\share\gdal C:\Windows\System32>SET GDAL_DRIVER_PATH=C:\OSGEO4~1\apps\gdal-dev\bin\gdalplugins C:\Windows\System32>PATH C:\OSGEO4~1\apps\gdal-dev\bin;C:\OSGEO4~1\apps\Python36\Scripts;C:\OSGEO4~1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem;C:\OSGEO4~1\apps\msys\bin C:\Windows\System32>call py3_env.bat C:\Windows\System32>SET PYTHONPATH= C:\Windows\System32>SET PYTHONHOME=C:\OSGEO4~1\apps\Python36 C:\Windows\System32>PATH C:\OSGEO4~1\apps\Python36;C:\OSGEO4~1\apps\Python36\Scripts;C:\OSGEO4~1\apps\gdal-dev\bin;C:\OSGEO4~1\apps\Python36\Scripts;C:\OSGEO4~1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem;C:\OSGEO4~1\apps\msys\bin C:\Windows\System32>SET PYTHONPATH=C:\OSGEO4~1\apps\gdal-dev\pymod3\lib\site-packages; C:\Windows\System32>PATH C:\OSGEO4~1\apps\gdal-dev\pymod3\scripts;C:\OSGEO4~1\apps\Python36;C:\OSGEO4~1\apps\Python36\Scripts;C:\OSGEO4~1\apps\gdal-dev\bin;C:\OSGEO4~1\apps\Python36\Scripts;C:\OSGEO4~1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem;C:\OSGEO4~1\apps\msys\bin
Verify environment ver. changed:
C:\Windows\System32>python --version Python 3.6.0
Attempt GDAL merge:
C:\Windows\System32>gdal_merge.bat -pct -ot Float32 -of GTiff -o "C:/Users/Joe/Desktop/OUTPUT.tif" D:/Personal/ned03m37089a1.tif D:/Personal/ned03m37089a2.tif
File "C:\OSGEO4~1\apps\Python36\lib\site.py", line 177
file=sys.stderr)
^
SyntaxError: invalid syntax
Double check Python environment ver:
C:\Windows\System32>python --version Python 2.7.5
Why would calling GDAL merge reset the python environment ver?
#8
Updated by Jürgen Fischer over 6 years ago
- Description updated (diff)
#9
Updated by Jürgen Fischer over 6 years ago
- Duplicates Bug report #17298: Processing: gdal merge python error on QGIS 3 added
#10
Updated by Nyall Dawson over 6 years ago
- Resolution set to up/downstream
- Status changed from Feedback to Closed
This was fixed upstream in osgeo4w