test_ok1/py/code/testing/test_cpython_features.py

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import new
def test_new_code_object_carries_filename_through():
class mystr(str):
pass
filename = mystr("dummy")
co = compile("hello\n", filename, 'exec')
assert not isinstance(co.co_filename, mystr)
c2 = new.code(co.co_argcount, co.co_nlocals, co.co_stacksize,
co.co_flags, co.co_code, co.co_consts,
co.co_names, co.co_varnames,
filename,
co.co_name, co.co_firstlineno, co.co_lnotab,
co.co_freevars, co.co_cellvars)
assert c2.co_filename is filename