這篇文章主要介紹了Python中tell()方法的使用詳解,是Python入門學習中的基礎知識,需要的朋友可以參考下
tell()方法返回的文件內的文件讀/寫指針的當前位置。
語法
以下是tell()方法的語法：
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1 fileObject.tell()參數
NA
返回值
此方法返回該文件中讀出的文件/寫指針的當前位置。
例子
下面的例子顯示了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()當我們運行上面的程序，它會產生以下結果：
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1 2 3 4 Name of the file: foo.txt Read Line: This is 1st line Current Position: 18
