Scripting: Armatures

Offical API-Doc Links:

• Armature Operators - Armature Type
• Bone - Edit Bone - Pose Bone

Get a list by

armatures = [obj for obj in bpy.context.scene.objects if obj.type=="ARMATURE"]

Armature

Blender differs between edit bones and pose bones. Edit bones can only be changed in edit mode!

obj=armatures[0]
if not obj.data.is_editmode:
    bpy.ops.object.mode_set(mode="EDIT") # first set edit mode!
print(len(obj.data.edit_bones)) # will show zero bones if not in edit mode!
for b in obj.data.edit_bones:
    print(f"{b.name}")

Check pose bones like this

obj=armatures[0]

# all bones
for b in obj.data.bones:
    print(b.name)

# get by name
if "nose" in obj.data.bones:
    nose_bone = obj.data.bones["nose"]

# active
print(obj.data.bones.active)

# edit mode
print(obj.data.is_editmode) # True/False