Function is_valid_function_name

pythonmemorymodule/pefile.py:2287–2292

(s)

@lru_cache(maxsize=2048)
def is_valid_function_name(s):
    return (
        s is not None
        and isinstance(s, (str, bytes, bytearray))
        and all(c in allowed_function_name for c in set(s))
    )


class PE: