0004000: Ability to suppress console output when running under python - FreeCAD Tracker

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ID	Project	Category	View Status	Date Submitted	Last Update

0004000	FreeCAD	Feature	public	2019-06-04 23:15	2020-10-14 21:10

Reporter	ardenpm	Assigned To	wmayer
Priority	low	Severity	feature	Reproducibility	always
Status	closed	Resolution	fixed

Summary	0004000: Ability to suppress console output when running under python
Description	As discussed in this forum thread it would be useful to be able to suppress FreeCAD messages: Forum thread Currently FreeCAD outputs a lot of messages to stdout during its operation. Typically this is very helpful, however in cases where it is desirable to using piping of output to another program it is desirable to control explicitly what is being output. Since the messages appear to often come from the C/C++ part of FreeCAD the simple work-arounds in Python do not easily suppress the messages and the more involve method described in the forum post is required. It also appears the `FreeCAD.Console.SetStatus("Console", "Log", False)` method does not impact these messages (regardless of whether Log, Wrn, Err, Msg are used) when running a script directly in Python. Perhaps it is just a matter of making the SetStatus method affect more types of output. It would seem to make sense for this to be under FreeCAD.Console however I am not clear if the messages coming from FreeCAD are coming from there or not.
Steps To Reproduce	Create a simple python script which does something in FreeCAD such as: `import FreeCAD import Part document_name = "combined" doc = FreeCAD.newDocument(document_name) FreeCAD.setActiveDocument(document_name) FreeCAD.ActiveDocument=FreeCAD.getDocument(document_name) shape_obj = doc.addObject("Part::Feature", "myshape") shape = Part.Shape() shape_obj.Shape = shape Part.export([shape_obj], "output.step")` This will result in the following output or similar when run with python: `FreeCAD 0.18, Libs: 0.18R16110 (Git) ... Writing STEP file...... Face... ***************************************************************** ** Statistics on Transfer (Write) ** *************************************************************** ** Transfer Mode = 0 I.E. As Is ** ** Transferring Shape, ShapeType = 0 ** WorkSession : Sending all data Step File Name : output.step(20 ents) Write Done` Switching stdout in Pythonland has now affect, the full redirection that includes the underlying native C/C++ functionality mentioned in the forum post is needed.
Additional Information	Note that the FreeCAD version stamp is possibly a special case. `FreeCAD 0.18, Libs: 0.18R16110 (Git)` It is displayed immediately on import of the FreeCAD Python module. Given the module isn't yet loaded when this is displayed I don't have a good suggestion for how to suppress it by setting a FreeCAD option or calling a FreeCAD method. Perhaps a built in which can be checked by FreeCAD: `import __builtin__ __builtin__.FreeCAD_display_banner = False import FreeCAD` Obviously with the default being True if not present to preserve the current behaviour. Note this is not proposed as a solution, just one way it could work, those more familiar with the codebase likely have a better idea. Alternatively if there is some persistent configuration that can be written to which is read on startup this would obviously work as well. Clearly FreeCAD has a lot of these but I'm not sure if they are loaded before or after the message is displayed.
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FreeCAD Information

FreeCAD: master 1406c03d 2019-06-13 13:46:49 wmayer Details Diff	fixes 0004000: Ability to suppress console output when running under python		Affected Issues 0004000
	mod - src/App/Application.cpp		Diff File
	mod - src/Main/MainCmd.cpp		Diff File
	mod - src/Main/MainGui.cpp		Diff File
	mod - src/Main/MainPy.cpp		Diff File

Date Modified	Username	Field	Change
2019-06-04 23:15	ardenpm	New Issue
2019-06-05 01:33	Kunda1	Description Updated
2019-06-05 01:34	Kunda1	Description Updated
2019-06-13 13:47	wmayer	Changeset attached	=> FreeCAD master 1406c03d
2019-06-13 13:47	wmayer	Note Added: 0013199
2019-06-13 13:47	wmayer	Assigned To	=> wmayer
2019-06-13 13:47	wmayer	Status	new => closed
2019-06-13 13:47	wmayer	Resolution	open => fixed
2019-06-13 13:47	wmayer	Fixed in Version	=> 0.19
2019-06-13 13:47	wmayer	Target Version	=> 0.19
2020-10-14 21:10	Kunda1	Relationship added	related to 0004081