'os.open() return an 'int' (PY-12124)
Signaure for 'zip()' for Python 2 (PY-12596)
Use '0o' in octal literals for Python 3 compatibility
Added 'exist_ok' to 'os.makedirs()' (PY-12028)
Updated signature of 'os.stat()' (PY-12242)
Return type of 'getattr()' is unknown if there is no other info about the object (PY-12073)