The difference between open () and with open () of

open

　　1, open the file

　　　　file = open ( "filename", "read-write mode")

　　2, manipulate files

　　　　***

　　3, close the file

　　　　file.close()

　　Precautions :

　　　　Using the open method, the file must be closed after the operation is completed, or long-term stay connected to the file, causing memory overflow occurred.

with open

　　1, open the file

　　　　with open ( "filename", "read-write") as file: 

　　2, manipulate files

　　　　***

　　3, close the file (automatically turn off)