Hi!
To make it short: I was tired of constantly renaming a lot of bones and objects during the rigging process and wrote a script to do just that.
It does find & replace, prefixes, suffixes and earases starting/ending letters.
Hopefully this is useful to some people 
# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
bl_addon_info = {
"name": "MultiRename",
"author": "DeeTee",
"version": (0,1),
"blender": (2, 5, 5),
"api": 32738,
"location": "View3D > Toolbar",
"description": "Provides a functions for renaming multiple objects and bones",
"warning": "",
"wiki_url": "",
"tracker_url": "",
"category": "Object"}
import bpy
class VIEW3D_PT_tools_multiobjectrename(bpy.types.Panel):
bl_space_type = 'VIEW_3D'
bl_region_type = 'TOOLS'
bl_context = "objectmode"
bl_label = "Renamer"
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
col.operator("object.multi_object_rename")
class VIEW3D_PT_tools_multibonerename(bpy.types.Panel):
bl_space_type = 'VIEW_3D'
bl_region_type = 'TOOLS'
bl_context = "armature_edit"
bl_label = "Renamer"
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
col.operator("object.multi_object_rename")
class VIEW3D_PT_tools_multiposebonerename(bpy.types.Panel):
bl_space_type = 'VIEW_3D'
bl_region_type = 'TOOLS'
bl_context = "posemode"
bl_label = "Renamer"
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
col.operator("object.multi_object_rename")
def doMultiObjectRename(context, eraseString, replacementString, trimStart, trimEnd, newPrefix, newSuffix):
if context.mode == 'EDIT_ARMATURE':
for bone in context.selected_bones:
temp = bone.name[trimStart:]
if trimEnd > 0:
temp = temp[:-trimEnd]
temp = temp.replace(eraseString, replacementString)
temp = newPrefix + temp + newSuffix
bone.name = temp[:]
elif context.mode == 'OBJECT':
for obj in bpy.context.selected_objects:
temp = obj.name[trimStart:]
if trimEnd > 0:
temp = temp[:-trimEnd]
temp = temp.replace(eraseString, replacementString)
temp = newPrefix + temp + newSuffix
obj.name = temp[:]
elif context.mode == 'POSE':
for bone in context.selected_pose_bones:
temp = bone.name[trimStart:]
if trimEnd > 0:
temp = temp[:-trimEnd]
temp = temp.replace(eraseString, replacementString)
temp = newPrefix + temp + newSuffix
bone.name = temp[:]
class MultiObjectRename(bpy.types.Operator):
'''Find & Replace-functionality for names'''
bl_idname = "object.multi_object_rename"
bl_label = "Rename Objects"
bl_description = "Operator with Find & Replace-functionality for object names and bone names"
bl_options = {'REGISTER', 'UNDO'}
eraseString = bpy.props.StringProperty(name="Find String",
description = "The string to look for in the object names",
)
replacementString = bpy.props.StringProperty(name = "Replace with",
description = "The replacement for the string given above",
)
trimStart = bpy.props.IntProperty(name="Trim Start:",
description = "Erases the specified number of letters from the beginning of the object names",
min = 0,
max = 50,
default = 0,
)
trimEnd = bpy.props.IntProperty(name="Trim End:",
description = "Erases the specified number of letters from the end of the object names",
min = 0,
max = 50,
default = 0,
)
newPrefix = bpy.props.StringProperty(name = "Prefix with",
description = "Adds the specified letters to the beginning of the object names",
)
newSuffix = bpy.props.StringProperty(name = "Suffix with",
description = "Adds the specified letters to the end of the object names",
)
@classmethod
def poll(cls, context):
return context.active_object != None
def execute(self, context):
doMultiObjectRename(context, self.eraseString, self.replacementString,
self.trimStart, self.trimEnd,
self.newPrefix, self.newSuffix)
return {'FINISHED'}
def register():
pass
def unregister():
pass
if __name__ == "__main__":
register()
Btw: I’m really new to python scripting, so there might be some problems, but don’t worry you can always use undo if something goes wrong.