Python3.5 day3作業一：實現簡單的shell sed替換功能

標籤：互動   ace   name   python3   sys   div   傳遞   pre   pen   

需求:

      1.使python具有shell中sed替換功能。

#!/usr/bin/env python#_*_conding:utf-8_*_#sys模組用於傳遞參數，os模組用於與系統互動.import sys,osold_file = sys.argv[1]new_file = sys.argv[2]file_path = sys.argv[3]f = open(file_path,"r")f1 = open("back","a+")for i in f:    if old_file in i:        i = i.replace(old_file,new_file)    f1.write(i)    f1.flush()f.close()f1.close()os.remove(file_path)os.rename("back",file_path)

 

Python3.5 day3作業一：實現簡單的shell sed替換功能