Python file read/write, Open

Import Library OS Library import OS

Get current directory

OS.GETCWD ()

Switch directories

Os.chdir (' Path ')

Open Write File

Import OS
OS.GETCWD ()
Os.chdir (' e:\\ ')
File1=open (' yuyang.txt ', ' a ')
File1.write (' \nthis is the seven line ')
File1.close ()

Open method

' A ' append to the end of the file to write data

' R ' read-only

' W ' write overwrite original file way write

' B ' binary mode Open

Open a read-in file

Import OS
OS.GETCWD ()
Os.chdir (' e:\\ ')
File1=open (' yuyang.txt ', ' r ')
File1.readlines (")
File1.close ()

ReadLines () Read all Files

ReadLine () reads a row of files

Python file read/write, Open