【python-致用】为嫖掘金月更奖品，我用刚学的python做了个批量文件内容替换

---
theme: healer-readable
highlight: a11y-dark
---

import os
def alter(file,old_str,new_str):
    #"""
    #将替换的字符串写到一个新的文件中，然后将原文件删除，新文件改为原来文件的名字
    #:param file: 文件路径
    #:param old_str: 需要替换的字符串
    #:param new_str: 替换的字符串
    #:return: None
    #"""
    with open(file, "r", encoding="utf-8") as f1,open("%s.bak" % file, "w", encoding="utf-8") as f2:
        for line in f1:
            if old_str in line:
                line = line.replace(old_str, new_str)
            f2.write(line)
    os.remove(file)
    os.rename("%s.bak" % file, file)
alter("file1", "python", "测试")

import os
def add_font(file, text):
    # 将 text 字符串添加在文件开头
    with open(file, "r", encoding="utf-8") as f1,open("%s.bak" % file, "w", encoding="utf-8") as f2:
        f2.write(text)
        for line in f1:
            f2.write(line)
    os.remove(file)
    os.rename("%s.bak" % file, file)

path = './' # 该 py 脚本所在目录
dirs = os.listdir(path)

# 记得导入依赖的包！
from fnmatch import fnmatch 
print(fnmatch(filename, '*.md'))

# -*- coding: utf-8 -*-
import os
from fnmatch import fnmatch
# -----------------------------------------------------------------------------------------------   
def alter(file,old_str,new_str):
    # """
    # 将替换的字符串写到一个新的文件中，然后将原文件删除，新文件改为原来文件的名字
    # 小贴士：采用按行匹配，故传入的字符串参数不应包含多行
    # :param file: 文件路径
    # :param old_str: 需要替换的字符串
    # :param new_str: 替换的字符串
    # :return: None
    # """
    with open(file, "r", encoding="utf-8") as f1,open("%s.bak" % file, "w", encoding="utf-8") as f2:
        for line in f1:
            if old_str in line:
                line = line.replace(old_str, new_str)
            f2.write(line)
    os.remove(file)
    os.rename("%s.bak" % file, file)
# -----------------------------------------------------------------------------------------------   
def add_font(file, text):
    # 在开头添加一段字符串
    with open(file, "r", encoding="utf-8") as f1,open("%s.bak" % file, "w", encoding="utf-8") as f2:
        f2.write(text)
        for line in f1:
            f2.write(line)
    os.remove(file)
    os.rename("%s.bak" % file, file)
# -----------------------------------------------------------------------------------------------   
# 主程序
path = './' # 该 py 脚本所在目录
dirs = os.listdir(path)
num = 1
for filename in dirs:
    if(fnmatch(filename, '*.md')):
        print(str(num) + '  ' + filename)
        num = num + 1
print('以上为当前目录下的所有 md 文件，是否继续替换？\n')
input('按回车开始替换')
for filename in dirs:
    if(fnmatch(filename, '*.md')):
        print('已替换：'+filename)
        add_font(filename, "---\ntheme: healer-readable\n---\n持续创作，加速成长！这是我参与「掘金日新计划 · 10 月更文挑战」的第N天，[点击查看活动详情](https://juejin.cn/post/7147654075599978532 \"https://juejin.cn/post/7147654075599978532\")\n")
        alter(filename, "[清风莫追]", "[CSDN清风莫追]")
        alter(filename, " =300x", "") 
        alter(filename, " =400x", "")
        alter(filename, " =500x", "")
        alter(filename, "==", "**")
        alter(filename, ">个", ">\n>个")
        alter(filename, ">系", ">\n>系")
        alter(filename, ">推", ">\n>推")
        alter(filename, "> 个", ">\n> 个")
        alter(filename, "> 系", ">\n> 系")
        alter(filename, "> 推", ">\n> 推")
        alter(filename, "@[toc]", "")
        alter(filename, "[CSDN话题挑战赛第2期](https://marketing.csdn.net/p/7b6697fd9dd3795a268d1a6f2fe75012)", "")
        alter(filename, "参赛话题：[学习笔记](https://activity.csdn.net/creatActivity?id=10213)", "")
print("已将所有md文档替换为掘金10月月更版本！")