__boot__.py 文件源码

def _run():
    global __file__
    import os, site
    sys.frozen = 'macosx_app'

    argv0 = os.path.basename(os.environ['ARGVZERO'])
    script = SCRIPT_MAP.get(argv0, DEFAULT_SCRIPT)

    sys.argv[0] = __file__ = script
    if sys.version_info[0] == 2:
        with open(script, 'rU') as fp:
            source = fp.read() + "\n"
    else:
        with open(script, 'rb') as fp:
            encoding = guess_encoding(fp)

        with open(script, 'r', encoding=encoding) as fp:
            source = fp.read() + '\n'

        BOM=b'\xef\xbb\xbf'.decode('utf-8')
        if source.startswith(BOM):
            source = source[1:]


    exec(compile(source, script, 'exec'), globals(), globals())