Python檔tell()方法

Python檔的tell()方法返回檔中的檔讀/寫指針的當前位置。

語法

以下是tell()方法的語法 -

fileObject.tell()

參數

• NA

返回值

• 該方法返回檔讀/寫指針的當前位置。

示例

假設’foo.txt‘檔中包含以下行 -

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

以下示例顯示了tell()方法的用法。

#!/usr/bin/python3

fo = open("foo.txt", "r+")
print ("Name of the file: ", fo.name)

line = fo.readline()
print ("Read Line: %s" % (line))

pos=fo.tell()
print ("current position : ",pos)

# Close opened file
fo.close()

執行上面代碼後，將得到以下結果 -

Name of the file:  foo.txt
Read Line: This is 1st line

Current Position: 18