"""Convert a NT pathname to a file URL and vice versa."""def url2pathname(url):    r"""Convert a URL to a DOS path.            ///C|/foo/bar/spam.foo                    becomes            C:\foo\bar\spam.foo    """    import string, urllib    if not '|' in url:        # No drive specifier, just convert slashes        if url[:4] == '////':            # path is something like ////host/path/on/remote/host            # convert this to \\host\path\on\remote\host            # (notice halving of slashes at the start of the path)            url = url[2:]        components = url.split('/')        # make sure not to convert quoted slashes :-)        return urllib.unquote('\\'.join(components))    comp = url.split('|')    if len(comp) != 2 or comp[0][-1] not in string.ascii_letters:        error = 'Bad URL: ' + url        raise IOError, error    drive = comp[0][-1].upper()    components = comp[1].split('/')    path = drive + ':'    for  comp in components:        if comp:            path = path + '\\' + urllib.unquote(comp)    return pathdef pathname2url(p):    r"""Convert a DOS path name to a file url.            C:\foo\bar\spam.foo                    becomes            ///C|/foo/bar/spam.foo    """    import urllib    if not ':' in p:        # No drive specifier, just convert slashes and quote the name        if p[:2] == '\\\\':        # path is something like \\host\path\on\remote\host        # convert this to ////host/path/on/remote/host        # (notice doubling of slashes at the start of the path)            p = '\\\\' + p        components = p.split('\\')        return urllib.quote('/'.join(components))    comp = p.split(':')    if len(comp) != 2 or len(comp[0]) > 1:        error = 'Bad path: ' + p        raise IOError, error    drive = urllib.quote(comp[0].upper())    components = comp[1].split('\\')    path = '///' + drive + '|'    for comp in components:        if comp:            path = path + '/' + urllib.quote(comp)    return path