Python Self-study Note (v) Python text manipulation

One, Python's own method

R:read Read

W:write Write

A:append Tail Line Append

After the command line enters Python

>>>d = open (' A.txt ', ' W ') #在对应路径下打开a. txt text, if not, create one and assign to the variable D

>>>d.write (' good\n hi ') #写入

>>>d.close () #关闭文件

>>>d = open (' A.txt ', ' R ')

>>>print D.readline () #读一行

Good

>>>print D.readline () #接着读下一行

Hi

>>>d.seek (0) #将游标重置

Print D.read (#传入数字), number of rows

Good

Hi

Second, the module method

Import Linecache

>>>linecache.getline ("A.txt", 2) 2 is the number of rows

>>>linecache.getlines ("A.txt")--put each row in the list

Saves the module string's help document to a file

Import Sys

Import string

f = open (' Test.log ', ' W ')

Sys.stdout = f #将标准的输出流绑定在文档的写入方法里面

Help (String) #输出

F.colse ()

Python Self-study Note (v) Python text manipulation