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最后版本已经更新了，昨天那个问题已经解决了☺️

# -*- coding: utf-8 -*-
# @Time  : 2018/12/5 10:21
# @Author : Monica
# @Email : 498194410@qq.com
# @File  : os_practice.py

import os
import hashlib

allfiles = []
templist = {}
end_file = []


class GetFlie:
    def __init__(self, dirpath):
        self.dirpath = dirpath

    def get_all_file(self):
        # 通过os.walk获取目录下的所有文件名
        for root, dirs, files in os.walk(self.dirpath):
            for file in files:
                # 判断size
                size = os.path.getsize(os.path.join(root, file))
                if size >= 10485760:
                    # 文件名添加到allfiles列表里
                    allfiles.append(os.path.join(root, file))
        # 重命名
        for i in range(len(allfiles)):
            # 如果md5在字典的key已存在
            if self.get_md5(allfiles[i]) in templist.keys():
                templist[self.get_md5(allfiles[i]) + str(i)] = allfiles[i].split(".")[0] + str(i) + "." + allfiles[i].split(".")[-1]
            else:
                templist[self.get_md5(allfiles[i])] = allfiles[i]
        # 最后的文件
        for file in templist.values():
            end_file.append(file)

        return end_file

    @staticmethod
    def get_md5(filename):
        f = open(filename, 'rb')
        m1 = hashlib.md5()
        m1.update(f.read())
        hash_code = m1.hexdigest()
        f.close()
        md5 = str(hash_code).lower()
        return md5

if __name__ == '__main__':
    path = r'I:\lesson_practice\tool'
    print(GetFlie(path).get_all_file())