python模块——hashlib模块（简单文件摘要算法实现）

#!/usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = "loki"

# Usage: hashlib模块

import hashlib
import time


# wrapper function calc length and use time
def len_type_tools(res):
    def wrapper(*args, **kwargs):
        cur_time = time.time()
        len_res = len(res(*args, **kwargs))
        result = res(*args, **kwargs)
        end_time = time.time() - cur_time
        print('Primary HASH result length is {0}, use time {1:.2f}'.format(len_res, end_time))
        return result
    return wrapper


def menu_list():
    func_list = {}
    for item in hashlib.__dict__:
        if str(item).startswith("sha") or str(item).startswith("md5"):
            func_list[item] = hashlib.__dict__[item]
    return func_list


@len_type_tools
def algol(data, num):
    if num != 1:
        user_choose = menu_list()[data[1]]()
        user_choose.update(data[0].encode("utf-8"))
        return user_choose.hexdigest()
    user_choose = menu_list()["md5"]()
    user_choose.update(data[0].encode("utf-8"))
    return user_choose.hexdigest()


def file_read(path):
    with open(r"{}".format(path), 'rb') as file_info:
        file_bin = file_info.read()
        return file_bin


def main():
    """
    .::hashlib small tools::.
        by: loki 2018-06-25
    format:
    >> <file_path> [algol]
    algol:
    md5(default)
    sha1
    sha224
    sha256
    sha384
    sha512
    example:
    >> c:\\test.txt sha1
    :return hash_value
    """
    print(main.__doc__)
    file_path = input('>>').strip()
    file_path = file_path.split()
    argument_num = len(file_path)
    print(algol(file_path, argument_num))


if __name__ == '__main__':
    main()
    time.sleep(15)

 

小结：

  再这个hashlib模块学习中，顺便回顾了下装饰器。也运用了下魔术方法__dict__功能