详解详解Python中writelines()方法的使用_Python

详解详解Python中writelines()方法的使用

2020-07-06 13:18Python教程网 Python

这篇文章主要介绍了详解详解Python中writelines()方法的使用,是Python入门学习中的基础知识,需要的朋友可以参考下

writelines()方法写入字符串序列到文件。该序列可以是任何可迭代的对象产生字符串，字符串为一般列表。没有返回值。
语法

以下是writelines()方法的语法：

1	`fileObject.writelines( sequence )`

参数

sequence -- 这是字符串的序列。

返回值

此方法不返回任何值。
例子

下面的例子显示writelines()方法的使用。

									#!/usr/bin/python'

									# Open a file in witre mode

									fo = open("foo.txt", "rw+")

									print "Name of the file: ", fo.name

									# Assuming file has following 5 lines

									# This is 1st line

									# This is 2nd line

									# This is 3rd line

									# This is 4th line

									# This is 5th line

									seq = ["This is 6th line\n", "This is 7th line"]

									# Write sequence of lines at the end of the file.

									fo.seek(0, 2)

									line = fo.writelines( seq )

									# Now read complete file from beginning.

									fo.seek(0,0)

									for index in range(7):

									  line = fo.next()

									  print "Line No %d - %s" % (index, line)

									# Close opend file

									fo.close()

当我们运行上面的程序，它会产生以下结果：

									Name of the file: foo.txt

									Line No 0 - This is 1st line

									Line No 1 - This is 2nd line

									Line No 2 - This is 3rd line

									Line No 3 - This is 4th line

									Line No 4 - This is 5th line

									Line No 5 - This is 6th line

									Line No 6 - This is 7th line