python题库练习

知识点复习：

encoding = utf-8

import re

文件操作，读r:默认，写w, 追加a

with open (“d:\data\a.txt”, “r”, encoding=“utf-8”) as f: # “r” “utf-8” 有引号!
new_content = “”
# f.read() 读文件内容，返回字符串，太大的文件不能用这个方法
content = f.read()
# 正则替换
new_content = re.sub(r"\d+","",content)

写文件 w

with open (“d:\data\b.txt”, “w”, encoding=“utf-8”) as f:
f.write(new_content)

with open (“d:\data\b.txt”) as f:
print(f.read())

2、""“遍历目录下的所有文件，去掉字母以外字符”""

encoding=utf-8

import re
import os

def get_file_path_list(directory):
for root, dirs, files in os.walk(directory):
file_path_list = []
for each_file in files:
# 转成绝对路径！
file_path = os.path.join(root, each_file) # root
print(file_path)
file_path_list.append(file_path)
return file_path_list

def filter_file(file_path_list):