maya unlock all attribute

import maya.cmds as cmds


def GetAllCurves():
    objs = []
    curves = cmds.ls(type="nurbsCurve", ni=True, o=True, r=True, l=True)
    joints = cmds.ls(type="joint", ni=True, o=True, r=True, l=True)
    for i in curves:
        objs.append(i)
    for i in joints:
        objs.append(i)
    transforms = cmds.listRelatives(objs, p=True, type="transform")
    return transforms


def UnlockAll():
    locked = []
    objs = cmds.ls()
    for obj in objs:
        attrs = cmds.listAttr(obj)
        for attr in attrs:
            try:
                attrObj = "{0}.{1}".format(obj, attr)
                if cmds.getAttr(attrObj, lock=True) == True:
                    cmds.setAttr(attrObj, lock=0)
                    locked.append(attrObj)
            except ValueError:
                continue
    print(locked)


UnlockAll()


# get a list of all objects in the scene
obj_list = cmds.ls()

# loop over each object in the list and unlock its channels
for obj in obj_list:
    attr_list = cmds.listAttr(obj, keyable=True)
    try:
        for attr in attr_list:
            try:
                cmds.setAttr(obj+"."+attr, lock=False)
            except:
                pass
    except:
        pass