#!/usr/bin/env python3"""A demo metadata mapper""" import sysimport json def main():    i = json.load(sys.stdin)    # Add tag to description    metadata = i["Metadata"]    if "description" in metadata:        metadata["description"] += " [migrated from domain1]"    else:        metadata["description"] = "[migrated from domain1]"    # Modify owner    if "owner" in metadata:        metadata["owner"] = metadata["owner"].replace("domain1.com", "domain2.com")    o = { "Metadata": metadata }    json.dump(o, sys.stdout, indent="\t") if __name__ == "__main__":    main()