def func(path, field_storage, temporary):
'''基本描述
详细描述
Args:
path (str): The path of the file to wrap
field_storage (FileStorage): The :class:`FileStorage` instance to wrap
temporary (bool): Whether or not to delete the file when the File instance is destructed
Returns:
BufferedFileStorage: A buffered writable file descriptor
'''
pass
具体参考:https://blog.csdn.net/lly1122334/article/details/80733908