mysql入门第三天_pymysql操作封装
1 import pymysql 2 3 class ricosql(): 4 def __init__(self,host,user,passwd,db_name): 5 self.host=host 6 self.user=user 7 self.passwd=passwd 8 self.db_name=db_name 9 10 def connet(self): 11 self.db=pymysql.connect(self.host,self.user,self.passwd,self.db_name) 12 self.cursor=self.db.cursor() 13 14 def colse(self): 15 self.cursor.close() 16 self.db.close() 17 18 def get_one(self,sql): 19 res=None 20 try: 21 self.connet() 22 self.cursor.execute(sql) 23 res=self.cursor.fetchone() 24 self.colse() 25 except: 26 print("查询失败") 27 return res 28 29 def get_all(self,sql): 30 res=() 31 try: 32 self.connet() 33 self.cursor.execute(sql) 34 res=self.cursor.fetchall() 35 self.colse() 36 except: 37 print("查询失败") 38 39 return res 40 41 def insert(self,sql): 42 return self.__edit(sql) 43 def update(self,sql): 44 return self.__edit(sql) 45 def delete(self,sql): 46 return self.__edit(sql) 47 48 def __edit(self,sql): 49 count=0 50 try: 51 self.connet() 52 count=self.cursor.execute(sql) 53 self.db.commit() 54 self.colse() 55 except: 56 print("事物提交失败") 57 self.db.rollback() 58 59 return count
测试：
from ricosql import ricosql s=ricosql('localhost','root','ss@123','kaige') res=s.get_all('select * from bandcard where money>300') for row_res in res: print(row_res[0],'>>>',row_res[1])
结果：
"D:\Program Files (x86)\python36\python.exe" F:/python从入门到放弃/6.11/test.py 1 >>> 1000 4 >>> 400 5 >>> 500 Process finished with exit code 0
