FileNotFoundError的替代方法是什么：[WinError 3]

Question

file_data = [f for f in listdir(path) if isfile (join(path, f))]
    for line in file_data:
        if ( line[-1:] == '\n' ):
            line = line[:-1]

FileNotFoundError：[WinError 3]系统找不到开发方法