Python中tell()方法的使用詳解

tell()方法返回的檔案內的檔案讀/寫指標的當前位置。
文法

以下是tell()方法的文法：

fileObject.tell()

參數

• NA

傳回值

此方法返回該檔案中讀出的檔案/寫指標的當前位置。
例子

下面的例子顯示了tell()方法的使用。

#!/usr/bin/python# Open a filefo = 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 lineline = fo.readline()print "Read Line: %s" % (line)# Get the current position of the file.pos = fo.tell()print "Current Position: %d" % (pos)# Close opend filefo.close()

當我們運行上面的程式，它會產生以下結果：

Name of the file: foo.txtRead Line: This is 1st lineCurrent Position: 18

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