一、匿名函数
递归、就是调用自己
1 def func(): 2 num = int(input('num:')) 3 if num % 2 ==0: 4 print('是偶数') 5 return 6 else: 7 func() 8 func() # 递归最多循环999次 匿名函数lambda
1 f = lambda x,b:str(x+b) 2 result = f(1,2) 3 print(f)
二、读写excel
1 import xlwt 2 book = xlwt.Workbook() 3 sheet = book.add_sheet('sheet1') 4 sheet.write(0,0,'名字') 5 sheet.write(1,0,'张三') 6 sheet.write(2,0,'李四') 7 sheet.write(3,0,'王五') 8 9 sheet.write(0,1,'手机号') 10 sheet.write(1,1,'18235437789') 11 sheet.write(2,1,'13875437919') 12 sheet.write(3,1,'18645438531') 13 14 book.save("students.xls") 15 16 stus=[ 17 [ 18 "id", 19 "name", 20 "sex", 21 "age", 22 "addr", 23 "grade", 24 "phone", 25 "gold" 26 ], 27 [ 28 314, 29 "矿泉水", 30 "男", 31 18, 32 "北京市昌平区", 33 "摩羯座", 34 "18317155663", 35 14405 36 ], 37 [ 38 315, 39 "矿泉水", 40 "女", 41 27, 42 "上海", 43 "摩羯座", 44 "18317155664", 45 100 46 ], 47 [ 48 5985, 49 "矿泉水", 50 "男", 51 18, 52 "北京市昌平区", 53 "班级", 54 "18513867663", 55 100 56 ] 57 ] 58 59 for row,stu in enumerate(stus): 60 for col,field in enumerate(stu): 61 sheet.write(row,col,field) 62 book.save('students.xls') 三、操作数据库mysql
1 import pymysql 2 3 def op_mysql(sql): 4 db_info = {'user': 'jxz', 'password': '123456', 'host': '118.24.3.40', 'db': 'jxz', 5 'port': '3306', 'charset': 'utf8', 'autocommit': 'True'} 6 conn = pymysql.connect(**db_info) # 建立连接 7 cur = conn.cursor(pymysql.cursors.DictCursor) # 游标 8 cur.execute(sql) # 执行sql语句，inset\update\delete 9 result = cur.fetchall() 10 cur.close() 11 conn.close() 12 return result 13 14 ip="118.24.3.40" 15 user = 'jxz' 16 password="123456" 17 db='jxz' 18 port=3306 19 charset='utf8' 20 conn=pymysql.connect(host=ip,user=user,password=password,db=db,port=port,charset=charset,autocommit=True) 21 22 cur = conn.cursor()# 游标 23 24 sql = 'select * from app_myuser limit 15;' 25 cur.execute(sql) # 执行sql语句 26 one = cur.fetchone() 27 many = cur.fetchmany(2) 28 all = cur.fetchall() 29 30 cur.close() # 关连接 31 conn.close() # 关游标 32 33 print(one) 34 print(many) 35 print(all) 四、MD5加密
1 import hashlib 2 3 # s='admin123' 4 # print(s.encode()) 5 # m = hashlib.md5(s.encode()) 6 # result = m.hexdigest() # 获取加密后的结果 7 # print(result) 8 9 def md5(s,salt=''): 10 new_s = str(s) + salt 11 m = hashlib.md5(new_s.encode()) 12 return m.hexdigest() 13 14 15 import base64 16 17 s='哈哈哈哈' 18 b = base64.b16encode(s.encode()) # 加密 19 result=b.decode() 20 print(result) 21 22 b = base64.b64decode( '5ZOI5ZOI5ZOI5ZOI' ) #解密 23 print(b.decode())
五、redis操作
1 import redis 2 3 # 关系型数据库 4 # mysql 、 oracle 、 sqlserver 、 sqlite 5 6 7 # 非关系型数据库 NoSql 8 # mongodb 、 redis 9 # redis 每秒钟达到10w次读写，存在内存里面 10 r = redis.Redis(host='118.24.3.40',password='HK139bc&*',port=6379,db=0,decode_responses=True) 11 12 r.set('dabaobao','{"msg":"hejfdsfdsaj dlajfwajofjdsa是范德萨范德萨"}') 13 info = r.get('dabaobao') 14 print(info) 15 print(info.decode()) # 显示中文 16 17 # r.delete('mjz_students') 18 # r.set('mjz_students','{"msg":"s fsada sfa fdasf as "}')
来源：博客园
作者：ZibinChen
链接：https://www.cnblogs.com/zibinchen/p/11780279.html