processing.algorithmHelp from terminal (outside QGIS desktop)

[FrancoisChaumont]

Describe the bug

No matter which provider:algorithm algorithmHelp is trying to display details for it seems to encounter the same issue when running from terminal outside of QGIS desktop.

Here below is the output for processing.algorithmHelp("native:creategrid"):

Create grid (native:creategrid)
...
CRS: Grid CRS

        Parameter type: QgsProcessingParameterCrs

        Accepted data types:
Traceback (most recent call last):
    ...
    processing.algorithmHelp("native:creategrid")
  File "/usr/share/qgis/python/plugins/processing/tools/general.py", line 75, in algorithmHelp
    print('\n'.join(opts))
UnicodeEncodeError: 'ascii' codec can't encode character '\u2026' in position 94: ordinal not in range(128)

How to Reproduce

Run the following script:

import os
import sys
import getopt

sys.path.append('/usr/lib/qgis')
sys.path.append('/usr/share/qgis/python/plugins')

from qgis.core import QgsApplication

QgsApplication.setPrefixPath('/usr', True)
app = QgsApplication([], False)
app.initQgis()

from qgis.analysis import QgsNativeAlgorithms
app.processingRegistry().addProvider(QgsNativeAlgorithms())

import processing
from processing.core.Processing import Processing

Processing.initialize()

processing.algorithmHelp("native:creategrid")

app.exitQgis()

QGIS and OS versions

QGIS version	3.14.0-Pi	QGIS code revision	9f7028f
Compiled against Qt	5.9.5	Running against Qt	5.9.5
Compiled against GDAL/OGR	2.2.3	Running against GDAL/OGR	2.2.3
Compiled against GEOS	3.6.2-CAPI-1.10.2	Running against GEOS	3.7.1-CAPI-1.11.1 27a5e771
Compiled against SQLite	3.22.0	Running against SQLite	3.22.0
PostgreSQL Client Version	10.12 (Ubuntu 10.12-0ubuntu0.18.04.1)	SpatiaLite Version	4.3.0a
QWT Version	6.1.3	QScintilla2 Version	2.10.2
PROJ.4 Version	493
OS Version	Ubuntu 18.04.4 LTS
Active python plugins	qgis2web; batch_gps_importer; GpxSegmentImporter; shapetools; clipper; ClipMultipleLayers; QuickOSM; quick_map_services; timemanager; loadthemall; QGIS3-getWKT; GeoCoding; latlontools; qgis_resource_sharing; db_manager; processing; MetaSearch

[pblottiere]

I cannot reproduce the issue on ArchLinux.

[github-actions]

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[FrancoisChaumont]

Issue solved for QGIS 3.16 running on Ubuntu 20.04.

QGIS version	3.16.2-Hannover	QGIS code revision	f1660f9
Compiled against Qt	5.12.8	Running against Qt	5.12.8
Compiled against GDAL/OGR	3.0.4	Running against GDAL/OGR	3.0.4
Compiled against GEOS	3.8.0-CAPI-1.13.1	Running against GEOS	3.8.0-CAPI-1.13.1
Compiled against SQLite	3.31.1	Running against SQLite	3.31.1
PostgreSQL Client Version	12.5 (Ubuntu 12.5-0ubuntu0.20.04.1)	SpatiaLite Version	4.3.0a
QWT Version	6.1.4	QScintilla2 Version	2.11.2
Compiled against PROJ	6.3.1	Running against PROJ	Rel. 6.3.1, February 10th, 2020
OS Version	Ubuntu 20.04.1 LTS
Active python plugins	qgis2web; batch_gps_importer; GpxSegmentImporter; shapetools; clipper; mmqgis; ClipMultipleLayers; QuickOSM; geometry_paster; quick_map_services; timemanager; loadthemall; QGIS3-getWKT; GeoCoding; latlontools; qgis_resource_sharing; CalculateGeometry; CalcArea; db_manager; processing; MetaSearch