tarfile.TarFile.add().

ctypes.CDLL instances.

ctypes.CDLL instances.

ctypes.CDLL instances.

is now positional-only.

in methods of regular expression objects.

Thanks Greg Bengeult for the patch.

KeyError could be raised when cached function with full cache was
simultaneously called from differen threads with the same uncached arguments.

KeyError could be raised when cached function with full cache was
simultaneously called from differen threads with the same uncached arguments.

KeyError could be raised when cached function with full cache was
simultaneously called from differen threads with the same uncached arguments.

Windows requires at least the SYSTEMROOT environment variable to start Python.
If run_python_until_end() doesn't copy SYSTEMROOT, the function always fail on
Windows.

identity when they are copied or pickled.