python_文件修改

# !/usr/bin/env python
# -*-coding:UTF-8-*-

import sys
fin_str = sys.argv[1]
rep_str = sys.argv[2]
f = open('yesterday', 'r', encoding='utf-8')
f_new = open('yesterday1.bak', 'w', encoding='utf-8')

for line in f:
    if '吞噬进化斗罗大陆' in line:
        line = line.replace('吞噬进化斗罗大陆', 'jim')
    #     f_new.write(line)
    # else:
    #     f_new.write(line)
    f_new.write(line)   # 替换上面的代码
f.close()
f_new.close()

用with语句进行文件的打开操作，不用对句柄进行关闭，程序结束后自动关闭， 代码如下：

# !/usr/bin/env python
# -*-coding:UTF-8-*-

with open('yesterday', 'r', encoding='utf-8') as f, \
        open('yesterday', 'r', encoding='utf-8') as f_new:  # 用with语句就不用对句柄进行关闭
    for line in f:
        print(line)