这篇文章主要介绍了Python中tell()方法的使用详解,是Python入门学习中的基础知识,需要的朋友可以参考下
tell()方法返回的文件内的文件读/写指针的当前位置。
语法
以下是tell()方法的语法：
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1 fileObject.tell()参数
NA
返回值
此方法返回该文件中读出的文件/写指针的当前位置。
例子
下面的例子显示了tell()方法的使用。
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 #!/usr/bin/python # Open a file 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 line = fo.readline() print "Read Line: %s" % (line) # Get the current position of the file. pos = fo.tell() print "Current Position: %d" % (pos) # Close opend file fo.close()当我们运行上面的程序，它会产生以下结果：
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1 2 3 4 Name of the file: foo.txt Read Line: This is 1st line Current Position: 18
