遍历查找含特定字符的文件并排序

abc_311_1.txt
abc_311_2.txt
abc_311_3.txt
abc_311_4.txt

import os


def getFiles(dir, suffix):
    res = []
    for root, directory, files in os.walk(dir):  # =>当前根,根下目录,目录下的文件
        for filename in files:
            name, suf = os.path.splitext(filename)  # =>文件名,文件后缀
            '''if suf == suffix:
                # res.append(os.path.join(root, filename))  # =>吧一串字符串组合成路径'''
            if '_311_' in filename:
                res.append(filename)
    return res


# 声明字典
key_value = {}

for file in getFiles("D:/pyCode/tmp", '.txt'):
    print(file)
    print('file name:', os.path.splitext(file)[0])
    print(os.path.splitext(file)[0].split('_', 2)[2])
    num = int(os.path.splitext(file)[0].split('_', 2)[2])
    # 初始化
    key_value[num] = file

print("按键(key)排序1:")

# sorted(key_value) 返回一个迭代器
# 字典按键排序
for i in sorted(key_value):
    print((i, key_value[i]), end=" ")

print("
按键(key)排序2:")

listFile = []
for i in sorted(key_value):
    print(key_value[i])
    listFile.append(key_value[i])

for item in listFile:
    print(item)