1 # -*- coding:utf-8 -*-
2 # Author: JACK ZHAO
3
4 # 程序1: 实现简单的shell sed替换功能
5
6 import sys
7
8 #判断参数个数
9 if len(sys.argv) != 3
:
10 print(
"Usage: python_sed.py 'old string' 'net string'")
11 exit()
12 #读取所有行至内存中
13 with open(
"yesterday",
"r",encoding=
'utf-8') as f:
14 lines =
f.readlines()
15
16 #重新生成文件yesterday,读取内存中内容至新文件
17 with open(
"yesterday",
"w",encoding=
'utf-8') as f:
18 for line
in lines:
19 if sys.argv[1]
in line:
20 line = line.replace(sys.argv[1],sys.argv[2])
#sys.argv[1]:要替换的内容 sys.argv[2]:替换后的内容
21 f.write(line)
转载于:https://www.cnblogs.com/changmingzhao/p/7844767.html
相关资源：数据结构—成绩单生成器
