Parent meshes in a collection to an armature in Blender

ParentMeshesToArmature.py

import bpy
scene = bpy.context.scene

def get_root_armature(collection):
    for obj in collection.objects:
        if obj.type == 'ARMATURE':
            return obj
    else:
        return collection.objects['Root']

def remove_existing_armature_modifiers(obj):
    print("Removing any existing armature modifiers from '{}'.".format(obj.name))
    num_modifiers_removed = 0
    for modifier in obj.modifiers:
        if modifier.type == 'ARMATURE':
            obj.modifiers.remove(modifier)
            num_modifiers_removed += 1
    print("Removed {} modifier{} from '{}'.".format(num_modifiers_removed, "" if num_modifiers_removed == 1 else "s", obj.name))

def parent_object_to_armature(obj, armature):
    remove_existing_armature_modifiers(obj)
    print("Parenting '{}' to '{}'.".format(obj.name, armature.name))
    bpy.ops.object.mode_set(mode='OBJECT')
    bpy.ops.object.select_all(action='DESELECT')
    obj.select_set(True)
    armature.select_set(True)
    bpy.context.view_layer.objects.active = armature
    bpy.ops.object.parent_set(type='ARMATURE_AUTO')
    armature.select_set(False)

rig_collection = bpy.data.collections['Rig']
skeletal_collection = bpy.data.collections['SkeletalMesh']

skeletal_mesh_objects = list(skeletal_collection.objects)

root = get_root_armature(rig_collection)

for skeletal_mesh_object in skeletal_mesh_objects:
    parent_object_to_armature(skeletal_mesh_object, root)