title: Generating temp.proto file from temp_pb2.py file
body: <p>The protocol buffer compiler produces Python output when invoked with the --python_out= command-line flag. The parameter to the --python_out= option is the directory where you want the compiler to write your Python output. The compiler creates a .py file for each .proto file input.</p>
  
  <p>But can we generate the same source file from temp_pb2.py?</p>