a file-like
    object referring to an existing archive.

    The content of SOURCE is packed into an application archive in TARGET,
    which can be a filename or a file-like object.  If SOURCE is a directory,
    TARGET can be omitted and will default to the name of SOURCE with .pyz
    appended.

    The created application archive will have a shebang line specifying
    that it should run with INTERPRETER (there will be no shebang line if
    INTERPRETER is None), and a __main__.py which runs MAIN (if MAIN is
    not specified, an existing __main__.py will be used).  It is an error
    to specify MAIN for anything other than a directory source with no
    __main__.py, and it is an error to omit MAIN if the directory has no
    __main__.py.
    Fr!