python技巧总结之set、日志、rsa加密

一、日志模块logging模块调用

1、日志模块使用原理

#!/usr/bin/python
# -*- coding:utf-8 -*-

import logging

# 方式一：
"""
logging.basicConfig(filename='log1.log',
                    format='%(asctime)s - %(name)s - %(levelname)s -%(module)s:  %(message)s',
                    datefmt='%Y-%m-%d %H:%M:%S %p',
                    level=10)

logging.info('info,asdfasdfasdfasdf')
logging.error('error,asdfasdfasdf')
"""

# 方式二：

file_handler = logging.FileHandler('xxxxxxxx.log', 'a', encoding='utf-8')
file_handler.setFormatter(logging.Formatter(fmt="%(asctime)s - %(name)s - %(levelname)s:  %(message)s"))

logger = logging.Logger('s1', level=logging.INFO)
logger.addHandler(file_handler)

logger.info('1111')
logger.error('2222')

　2、日志模块封装使用

import logging
from config import settings

class Logger(object):
    def __init__(self):
        self.log_file_path = settings.LOG_FILE_PATH
        file_handler = logging.FileHandler(self.log_file_path, 'a', encoding='utf-8')
        file_handler.setFormatter(logging.Formatter(fmt="%(asctime)s - %(name)s - %(levelname)s:  %(message)s"))

        self.logger = logging.Logger('cmdb', level=logging.INFO)
        self.logger.addHandler(file_handler)

    def info(self,msg):
        self.logger.info(msg)
    def error(self,msg):
        self.logger.error(msg)

logger = Logger()

　二、set并集交集的使用

1》交集
>>> x={1,2,3,4}
>>> y={3,4,5,6}
>>> x
set([1, 2, 3, 4])
>>> y
set([3, 4, 5, 6])
>>> x&y
set([3, 4])
>>> x.intersection(y)
set([3, 4])
2》并集
>>> x | y #集合并集
set([1, 2, 3, 4, 5, 6])
>>> x.union(y)
set([1, 2, 3, 4, 5, 6])
3》差集
>>> x-y # x与y的差集
set([1, 2])
>>> x.difference(y)# x与y的差集
set([1, 2])
>>> y-x # y与x的差集
set([5, 6])
>>> y.difference(x)# y与x的差集
set([5, 6])
4》对称差集
>>> x^y
set([1, 2, 5, 6])
>>> y^x
set([1, 2, 5, 6])
>>> x.symmetric_difference(y)
set([1, 2, 5, 6])
>>> y.symmetric_difference(x)
set([1, 2, 5, 6])
5》集合的子集和超集
>>> x
set([1, 2, 3, 4])
>>> z
set([1, 2, 3])
>>> z.issubset(x)#z是x的子集
True
>>> x.issuperset(z)#x是z的超集

True

　　三、rsa加密

"""
pip3 install rsa
asdf
"""
import rsa
import base64

# ######### 1. 生成公钥私钥 #########
pub_key_obj, priv_key_obj = rsa.newkeys(1024) # 128 - 11 = 117
# 公钥字符串
pub_key_str = pub_key_obj.save_pkcs1()
pub_key_code = base64.standard_b64encode(pub_key_str)
print(pub_key_code)
# 私钥字符串
priv_key_str = priv_key_obj.save_pkcs1()
priv_key_code = base64.standard_b64encode(priv_key_str)
print(priv_key_code)

# # ######### 2. 加密 #########
def encrypt(pub_key_code,value):
    key_str = base64.standard_b64decode(pub_key_code)
    pk = rsa.PublicKey.load_pkcs1(key_str)
    result = rsa.encrypt(value.encode('utf-8'), pk)
    return result

data = encrypt(pub_key_code,'zff')
print(len(data),data)

# # ######### 3. 解密 #########
def decrypt(priv_key_code,value):
    key_str = base64.standard_b64decode(priv_key_code)
    pk = rsa.PrivateKey.load_pkcs1(key_str)
    val = rsa.decrypt(value, pk)
    return val

origin = decrypt(priv_key_code,data)
print(origin)
#
# # ######### 基本使用 #########
# if __name__ == '__main__':
#     v = 'wangshuyang'
#     v1 = encrypt(v)
#     print(v1)
#     v2 = decrypt(v1)
#     print(v2)