File函数 中的 file.writelines(sequen

Python file方法writlines()将字符串序列写入文件。序列可以是产生字符串的任何可迭代对象，通常是字符串列表。没有返回值。

file.writelines - 语法

下面是writlines()方法-的语法

fileObject.writelines( sequence )

• sequence  -  这是字符串的序列。

file.writelines - 示例

以下示例显示writlines()方法的用法。

This is 1st line
This is 2nd line
This is 3rd line
This is 4th line
This is 5th line

#!/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()

当无涯教程运行上面的程序时，它产生以下输出-

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