..function::freeze_support()

Add support for when a program which uses:mod:`multiprocessing` has been

frozen to producea Windows executable. (Has been tested with **py2exe**,

frozen to producean executable. (Has been tested with **py2exe**,

**PyInstaller** and **cx_Freeze**.)

One needs to call this function straight after the ``if __name__ ==

If the ``freeze_support()`` line is omitted then trying to run the frozen

executable will raise:exc:`RuntimeError`.

Calling ``freeze_support()`` has no effect when invoked on any operating

system other than Windows. In addition, if the module is being run

normally by the Python interpreter on Windows (the program has not been

Calling ``freeze_support()`` has no effect when the start method is not *spawn*. In addition, if the module is being run

normally by the Python interpreter (the program has not been

frozen), then ``freeze_support()`` has no effect.

..function::get_all_start_methods()