"""Macintosh-specific module for conversion between pathnames and URLs. Do not import directly; use urllib instead.""" import urllibimport os __all__ = ["url2pathname","pathname2url"] def url2pathname(pathname):    """OS-specific conversion from a relative URL of the 'file' scheme    to a file system path; not recommended for general use."""    #    # XXXX The .. handling should be fixed...    #    tp = urllib.splittype(pathname)[0]    if tp and tp != 'file':        raise RuntimeError, 'Cannot convert non-local URL to pathname'    # Turn starting /// into /, an empty hostname means current host    if pathname[:3] == '///':        pathname = pathname[2:]    elif pathname[:2] == '//':        raise RuntimeError, 'Cannot convert non-local URL to pathname'    components = pathname.split('/')    # Remove . and embedded ..    i = 0    while i < len(components):        if components[i] == '.':            del components[i]        elif components[i] == '..' and i > 0 and \                                  components[i-1] not in ('', '..'):            del components[i-1:i+1]            i = i-1        elif components[i] == '' and i > 0 and components[i-1] != '':            del components[i]        else:            i = i+1    if not components[0]:        # Absolute unix path, don't start with colon        rv = ':'.join(components[1:])    else:        # relative unix path, start with colon. First replace        # leading .. by empty strings (giving ::file)        i = 0        while i < len(components) and components[i] == '..':            components[i] = ''            i = i + 1        rv = ':' + ':'.join(components)    # and finally unquote slashes and other funny characters    return urllib.unquote(rv) def pathname2url(pathname):    """OS-specific conversion from a file system path to a relative URL    of the 'file' scheme; not recommended for general use."""    if '/' in pathname:        raise RuntimeError, "Cannot convert pathname containing slashes"    components = pathname.split(':')    # Remove empty first and/or last component    if components[0] == '':        del components[0]    if components[-1] == '':        del components[-1]    # Replace empty string ('::') by .. (will result in '/../' later)    for i in range(len(components)):        if components[i] == '':            components[i] = '..'    # Truncate names longer than 31 bytes    components = map(_pncomp2url, components)     if os.path.isabs(pathname):        return '/' + '/'.join(components)    else:        return '/'.join(components) def _pncomp2url(component):    component = urllib.quote(component[:31], safe='')  # We want to quote slashes    return component def test():    for url in ["index.html",                "bar/index.html",                "/foo/bar/index.html",                "/foo/bar/",                "/"]:        print '%r -> %r' % (url, url2pathname(url))    for path in ["drive:",                 "drive:dir:",                 "drive:dir:file",                 "drive:file",                 "file",                 ":file",                 ":dir:",                 ":dir:file"]:        print '%r -> %r' % (path, pathname2url(path)) if __name__ == '__main__':    test()