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 "}')