Deleting Objects from a scene

There might be quicker ways of doing this, but this describes the process.

# do not run this on a scene with more than 100 objects... it will be a waste of time. (printing is slow)
for item in bpy.data.objects:
... print(item.name, item.type)
... 

# objects of type mesh are containers for meshes.
# multiple differently named objects can share the same base mesh.
# objects are in that sense 'users' of mesh data.
for item in bpy.data.objects:
... if item.type == "MESH":
...     print(item.name)
... 
Mesh
Mesh.001

for mesh in bpy.data.meshes:
... print(mesh.name)
... 
Cube
Cube.001
Cube.002

# maybe use some blender forensics to consider the two printed sequences above. 
# what must I have done to have 3 mesh structures, but only 2 objects of type 'MESH'? 

we can't delete mesh data if an object uses it. And simply deleting an object doesn't flush the mesh it used (altho I do recall seeing a method that does exactly that)

	import bpy
	#unselect everything
	# <insert code here, this can vary depending on your situation>
	# bpy.ops.object.select_all()
	# gather list of items of interest.
	candidate_list = [item.name for item in bpy.data.objects if item.type == "MESH"]
	# select them only.
	for object_name in candidate_list:
	bpy.data.objects[object_name].select = True
	# remove all selected.
	bpy.ops.object.delete()
	# remove the meshes, they have no users anymore.
	for item in bpy.data.meshes:
	bpy.data.meshes.remove(item)

view raw how_to_sanitize_a_blend.py hosted with ❤ by GitHub

or if you can do a broad stroke:

	# PKHG points out in the comments that there are more convenient ways to do this
	bpy.ops.object.mode_set(mode='OBJECT')
	bpy.ops.object.select_by_type(type='MESH')
	bpy.ops.object.delete(use_global=False)
	for item in bpy.data.meshes:
	bpy.data.meshes.remove(item)

view raw remove_objs.py hosted with ❤ by GitHub