How do I convert a font object into a mesh object using Python? -- Blender 3.4.1

Question

I have been trying to use the bpy.ops.object.convert(target='MESH') to convert my font objects into mesh and curve objects. I have observed other people reporting problems doing this conversion. In the enclosed figure, the specific error that is reported is reported starting on line 22. When I do this operation manually, the conversion works fine. it is only when I try to write the python code that this problem happens. Any suggestions would be much appreciated. Thanks.

Answer 1

I think the problem is that select_all only sets the Font Object object as, well, select'd, not active. The bpy.ops.object.convert operator seems to expect that it is both active and select'd. (Also, side note; I avoid using select_all below, so that I don't select extra objects unintentionally.)

Making sure it is also the active object seems to work (tested in 2.83; I live in the past!):

import bpy
font_curve = bpy.data.curves.new(type="FONT", name="Font curve")
font_curve.body = "testing"
font_obj = bpy.data.objects.new(name="Font Object", object_data=font_curve)
bpy.context.scene.collection.objects.link(font_obj)
bpy.context.view_layer.objects.active = bpy.data.objects['Font Object'] # Need a reference to an `object`, not `TextCurve`, for this to work
bpy.context.object.select_set(True)
bpy.ops.object.convert(target='MESH')