use identity comparison with None (as suggested by python)

8 files changed, 14 insertions, 16 deletions

diff --git a/rigify/generate.py b/rigify/generate.py
index a860b86b..7dd0dac2 100644
--- a/rigify/generate.py
+++ b/rigify/generate.py
@@ -231,7 +231,7 @@ def generate_rig(context, metarig):
     # Parent any free-floating bones to the root.
     bpy.ops.object.mode_set(mode='EDIT')
     for bone in bones:
-        if obj.data.edit_bones[bone].parent == None:
+        if obj.data.edit_bones[bone].parent is None:
             obj.data.edit_bones[bone].use_connect = False
             obj.data.edit_bones[bone].parent = obj.data.edit_bones[root_bone]
     bpy.ops.object.mode_set(mode='OBJECT')
@@ -351,4 +351,3 @@ def param_name(param_name, rig_type):
     """ Get the actual parameter name, sans-rig-type.
     """
     return param_name[len(rig_type) + 1:]
-
diff --git a/rigify/rigs/biped/arm/fk.py b/rigify/rigs/biped/arm/fk.py
index 20ba89f2..77dcc6a6 100644
--- a/rigify/rigs/biped/arm/fk.py
+++ b/rigify/rigs/biped/arm/fk.py
@@ -49,7 +49,7 @@ class Rig:
             raise MetarigError("RIGIFY ERROR: Bone '%s': input to rig type must be a chain of 3 bones." % (strip_org(bone)))
 
         # Get (optional) parent
-        if self.obj.data.bones[bone].parent == None:
+        if self.obj.data.bones[bone].parent is None:
             self.org_parent = None
         else:
             self.org_parent = self.obj.data.bones[bone].parent.name
diff --git a/rigify/rigs/biped/leg/deform.py b/rigify/rigs/biped/leg/deform.py
index 2f9b2b02..bb6b6f39 100644
--- a/rigify/rigs/biped/leg/deform.py
+++ b/rigify/rigs/biped/leg/deform.py
@@ -99,7 +99,7 @@ class Rig:
                 else:
                     heel = b.name
 
-        if foot == None or heel == None:
+        if foot is None or heel is None:
             raise MetarigError("RIGIFY ERROR: Bone '%s': incorrect bone configuration for rig type." % (strip_org(bone)))
 
         # Get the toe
@@ -108,7 +108,7 @@ class Rig:
             if b.use_connect == True:
                 toe = b.name
 
-        if toe == None:
+        if toe is None:
             raise MetarigError("RIGIFY ERROR: Bone '%s': incorrect bone configuration for rig type." % (strip_org(bone)))
 
         self.org_bones = leg_bones + [foot, toe, heel]
@@ -261,4 +261,3 @@ class Rig:
             con.name = "track_to"
             con.target = self.obj
             con.subtarget = stip
-
diff --git a/rigify/rigs/biped/leg/fk.py b/rigify/rigs/biped/leg/fk.py
index bc7a8dbd..e231fa8e 100644
--- a/rigify/rigs/biped/leg/fk.py
+++ b/rigify/rigs/biped/leg/fk.py
@@ -59,7 +59,7 @@ class Rig:
                 else:
                     heel = b.name
 
-        if foot == None or heel == None:
+        if foot is None or heel is None:
             raise MetarigError("RIGIFY ERROR: Bone '%s': incorrect bone configuration for rig type." % (strip_org(bone)))
 
         # Get the toe
@@ -69,13 +69,13 @@ class Rig:
                 toe = b.name
 
         # Get the toe
-        if toe == None:
+        if toe is None:
             raise MetarigError("RIGIFY ERROR: Bone '%s': incorrect bone configuration for rig type." % (strip_org(bone)))
 
         self.org_bones = leg_bones + [foot, toe, heel]
 
         # Get (optional) parent
-        if self.obj.data.bones[bone].parent == None:
+        if self.obj.data.bones[bone].parent is None:
             self.org_parent = None
         else:
             self.org_parent = self.obj.data.bones[bone].parent.name
diff --git a/rigify/rigs/biped/leg/ik.py b/rigify/rigs/biped/leg/ik.py
index 42ead8b5..265b4e32 100644
--- a/rigify/rigs/biped/leg/ik.py
+++ b/rigify/rigs/biped/leg/ik.py
@@ -112,7 +112,7 @@ class Rig:
                     if len(b.children) > 0:
                         rocker = b.children[0].name
 
-        if foot == None or heel == None:
+        if foot is None or heel is None:
             print("blah")
             raise MetarigError("RIGIFY ERROR: Bone '%s': incorrect bone configuration for rig type." % (strip_org(bone)))
 
@@ -123,7 +123,7 @@ class Rig:
                 toe = b.name
 
         # Get toe
-        if toe == None:
+        if toe is None:
             raise MetarigError("RIGIFY ERROR: Bone '%s': incorrect bone configuration for rig type." % (strip_org(bone)))
 
         self.org_bones = leg_bones + [foot, toe, heel, rocker]
diff --git a/rigify/rigs/misc/delta.py b/rigify/rigs/misc/delta.py
index bc5f7eba..dc8edd41 100644
--- a/rigify/rigs/misc/delta.py
+++ b/rigify/rigs/misc/delta.py
@@ -39,7 +39,7 @@ class Rig:
         """
         bb = obj.data.bones
 
-        if bb[bone].children == None:
+        if bb[bone].children is None:
             raise MetarigError("RIGIFY ERROR: bone '%s': rig type requires one child." % org_name(bone.name))
         if bb[bone].use_connect == True:
             raise MetarigError("RIGIFY ERROR: bone '%s': rig type cannot be connected to parent." % org_name(bone.name))
diff --git a/rigify/rigs/palm.py b/rigify/rigs/palm.py
index 26cb3715..d1a3cf61 100644
--- a/rigify/rigs/palm.py
+++ b/rigify/rigs/palm.py
@@ -32,7 +32,7 @@ def bone_siblings(obj, bone):
     """
     parent = obj.data.bones[bone].parent
 
-    if parent == None:
+    if parent is None:
         return []
 
     bones = []
diff --git a/rigify/rigs/spine.py b/rigify/rigs/spine.py
index 2318b3b9..37dda1b1 100644
--- a/rigify/rigs/spine.py
+++ b/rigify/rigs/spine.py
@@ -215,7 +215,7 @@ class Rig:
             # Parenting
             bone_e.use_connect = False
             helper_e.use_connect = False
-            if prev_bone == None:
+            if prev_bone is None:
                 helper_e.parent = eb[hip_control]
             bone_e.parent = helper_e
 
@@ -314,7 +314,7 @@ class Rig:
             flip_bone(self.obj, bone)
             bone_e.tail = Vector(eb[b[0]].head)
             #bone_e.head = Vector(eb[b[0]].tail)
-            if prev_bone == None:
+            if prev_bone is None:
                 pass  # Position base bone wherever you want, for now do nothing (i.e. position at hips)
             else:
                 put_bone(self.obj, bone, eb[prev_bone].tail)
@@ -331,7 +331,7 @@ class Rig:
             con = bone_p.constraints.new('COPY_LOCATION')
             con.name = "copy_location"
             con.target = self.obj
-            if prev_bone == None:
+            if prev_bone is None:
                 con.subtarget = hip_control  # Position base bone wherever you want, for now hips
             else:
                 con.subtarget = prev_bone