def foo():
    return 'bar'

co = foo.__code__

co_copy = type(co)(co.co_argcount, 
                   co.co_kwonlyargcount, 
                   co.co_nlocals, 
                   co.co_stacksize, 
                   co.co_flags,
                   co.co_code, 
                   co.co_consts, 
                   co.co_names, 
                   co.co_varnames, 
                   co.co_freevars, 
                   co.co_cellvars, 
                   co.co_filename,
                   co.co_name, 
                   co.co_firstlineno, 
                   co.co_lnotab)