Function get_preparation_data

Lib/multiprocessing/spawn.py:160–204

Return info about parent needed by child to unpickle process object

(name)

def get_preparation_data(name):
    '''
    Return info about parent needed by child to unpickle process object
    '''
    _check_not_importing_main()
    d = dict(
        log_to_stderr=util._log_to_stderr,
        authkey=process.current_process().authkey,
        )

    if util._logger is not None:
        d['log_level'] = util._logger.getEffectiveLevel()

    sys_path=sys.path.copy()
    try:
        i = sys_path.index('')
    except ValueError:
        pass
    else:
        sys_path[i] = process.ORIGINAL_DIR

    d.update(
        name=name,
        sys_path=sys_path,
        sys_argv=sys.argv,
        orig_dir=process.ORIGINAL_DIR,
        dir=os.getcwd(),
        start_method=get_start_method(allow_none=True),
        )

    # Figure out whether to initialise main in the subprocess as a module
    # or through direct execution (or to leave it alone entirely)
    main_module = sys.modules['__main__']
    main_mod_name = getattr(main_module.__spec__, "name", None)
    if main_mod_name is not None:
        d['init_main_from_name'] = main_mod_name
    elif sys.platform != 'win32' or (not WINEXE and not WINSERVICE):
        main_path = getattr(main_module, '__file__', None)
        if main_path is not None:
            if (not os.path.isabs(main_path) and
                        process.ORIGINAL_DIR is not None):
                main_path = os.path.join(process.ORIGINAL_DIR, main_path)
            d['init_main_from_path'] = os.path.normpath(main_path)

    return d

#
# Prepare current process