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。
?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 #!/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 linen", "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：
?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 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
