python maya change namespace

import maya.cmds as cmds

def get_all_namespaces():
    namespaces = cmds.namespaceInfo(listOnlyNamespaces=True, recurse=True)
    return namespaces
    
def change_namespace(old_namespace, new_namespace):
    # Get a list of objects in the old namespace
    objects = cmds.namespaceInfo(old_namespace, listOnlyDependencyNodes=True, dagPath=True)

    # Create the new namespace
    cmds.namespace(add=new_namespace)

    # Rename the objects to the new namespace
    for obj in objects:
        new_name = obj.replace(old_namespace + ':', new_namespace + ':')
        cmds.rename(obj, new_name)

    # Remove the old namespace
    cmds.namespace(removeNamespace=old_namespace, mergeNamespaceWithRoot=True)

all_namespaces = get_all_namespaces()
print(all_namespaces)

map = {
    
    "s033": "step_002",
    "280": "004",
}

keys = map.keys()
for n in all_namespaces:
    renameJob = False
    newname = n
    for k in keys:
        if k in n:
            #print(n)
            newname = n.replace(k, map[k])
            renameJob=True
    if not renameJob: continue
    print(newname)
    change_namespace(n, newname)