windows下监控文件系统的变化，用python很方便。

相关参考链接：

http://docs.activestate.com/activepython/2.4/pywin32/win32file__ReadDirectoryChangesW_meth.html

    import os        import win32file                import win32con                        ACTIONS = {          1 : "Created",          2 : "Deleted",          3 : "Updated",          4 : "Renamed from something",          5 : "Renamed to something"        }                FILE_LIST_DIRECTORY = win32con.GENERIC_READ | win32con.GENERIC_WRITE        path_to_watch = "."        hDir = win32file.CreateFile (          path_to_watch,          FILE_LIST_DIRECTORY,          win32con.FILE_SHARE_READ | win32con.FILE_SHARE_WRITE,          None,          win32con.OPEN_EXISTING,          win32con.FILE_FLAG_BACKUP_SEMANTICS,          None        )                if __name__ == '__main__':            print("123")            while 1:                print("321")                results = win32file.ReadDirectoryChangesW (                                                       hDir,  #handle: Handle to the directory to be monitored. This directory must be opened with the FILE_LIST_DIRECTORY access right.                                                       1024,  #size: Size of the buffer to allocate for the results.                                                       True,  #bWatchSubtree: Specifies whether the ReadDirectoryChangesW function will monitor the directory or the directory tree.                                                        win32con.FILE_NOTIFY_CHANGE_FILE_NAME |                                                        win32con.FILE_NOTIFY_CHANGE_DIR_NAME |                                                        win32con.FILE_NOTIFY_CHANGE_ATTRIBUTES |                                                        win32con.FILE_NOTIFY_CHANGE_SIZE |                                                        win32con.FILE_NOTIFY_CHANGE_LAST_WRITE |                                                        win32con.FILE_NOTIFY_CHANGE_SECURITY,                                                       None,                                                       None)                for action, file in results:                    full_filename = os.path.join (path_to_watch, file)                    print (full_filename, ACTIONS.get (action, "Unknown"))