Python File readlines() usage

readlines() method is used to read all lines (until the end character EOF) and return a list. The list can be processed by Python's for... in ... structure. If the end character EOF is encountered, it returns empty. String, friends who need it can refer to

Overview

##readlines() method is used to read all lines (until the end character EOF) And returns a list, which can be processed by Python's for... in ... structure.

If the end character EOF is encountered, an empty string is returned.

Syntax

##readlines()

The method syntax is as follows: fileObject.readlines( );

Parameter

None.

Return value

Returns a list containing all rows.

Example

The following example demonstrates the use of the readline() method:
The content of the file jb51.txt is as follows:

1:www.jb51.net

2:www.jb51.net

3:www.jb51.net
4:www.jb51.net
5:www.jb51.net

Loop to read the contents of the file:

How to write python2

#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
# 打开文件
fo = open("jb51.txt", "r")
print "文件名为: ", fo.name
 
for line in fo.readlines():             #依次读取每行 
  line = line.strip()               #去掉每行头尾空白 
  print "读取的数据为: %s" % (line)
 
# 关闭文件
fo.close()

How to write python3

# -*- coding: utf-8 -*-
# 打开文件
fo = open("jb51.txt", "r")
print("文件名为: ",fo.name)
 
for line in fo.readlines():             #依次读取每行 
  line = line.strip()               #去掉每行头尾空白 
  print ("读取的数据为: %s" % (line))
 
# 关闭文件
fo.close()

The effect is as shown below

##

The above is the detailed content of Python File readlines() usage. For more information, please follow other related articles on the PHP Chinese website!