详解详解Python中writelines()方法的使用

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：

    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