Setting the right context in a python script? For a project involving 3D printing of some labels with varying text, I want to use a small script. I checked all commands interactively and piled them up. However the script fails while the interactive session doing this with mouse and keyboard succeeds (repeatedly).

I tried to minimize the problem, removed everything not strictly needed, to pinpoint the place where I stumbled, but I cannot put my finger on the right spot. It fails when converting the text object into a regular mesh, complaining on the context not being right.

What am I doing wrong?

The script contains:

### (re-)start Blender, I used version 2.77a
### - open the scripting window in the top menu bar
### - load this file into the text window
### - run it with the "Run Script" button
import bpy
status = bpy.ops.object.text_add(radius = 1.0)
print("status after object creation is: ", status)
myobject = bpy.context.active_object
print("myobject is: ", myobject)
myobject.data.body = "Hello World !"
status = bpy.ops.object.select_all(action='DESELECT')
print("status after deselect all is: ", status)
status = bpy.context.scene.update()                     # forces update
print("status after update is: ", status)
bpy.context.scene.objects.active = myobject
status = bpy.context.object.type
print(" bpy.context.object.type is: ", status)
status = bpy.ops.object.convert(target='MESH')          # fatal error
print("status after converting to a mesh is: ", status) # never reached


The console shows:

Read new prefs: /Users/wim/Library/Application Support/Blender/2.77/config/userpref.blend
found bundled python: /Applications/Utilities-3rd-party/blender.app/Contents/MacOS/../Resources/2.77/python
measureit: added to phytonpath
measureit: Imported multifiles
status after object creation is:  {'FINISHED'}
myobject is:  &lt;bpy_struct, Object("Text")&gt;
status after deselect all is:  {'FINISHED'}
status after update is:  None
 bpy.context.object.type is:  FONT
Traceback (most recent call last):
  File "/test-convert-mesh.py", line 18, in &lt;module&gt;
  File "/Applications/Utilities-3rd-party/blender.app/Contents/MacOS/../Resources/2.77/scripts/modules/bpy/ops.py", line 189, in __call__
    ret = op_call(self.idname_py(), None, kw)
RuntimeError: Operator bpy.ops.object.convert.poll() failed, context is incorrect
Error: Python script fail, look in the console for now...
As well as making the text object the context object you need to reselect it. (You did call deselect after all). An object can be context.active_object while not context.active_object.select  Some operators that work on all objects selected may only go thru the context.selected_objects list.

bpy.context.scene.objects.active = myobject
myobject.select = True
status = bpy.context.object.type
print(" bpy.context.object.type is: ", status)
status = bpy.ops.object.convert(target='MESH')          # fatal error

print("status after converting to a mesh is: ", status)