python 中mysql数据库的读写

1.读取数据库

 import pymysql
 id=[]
 name=[]
 explain=[]
 db=pymysql.Connection(host="localhost",port=,user="root", password="root",database="jiansuo",charset="utf8")
 cursor=db.cursor()
 sql="select * from yuan"
 try:
     cursor.execute(sql)
     results=cursor.fetchall()
     for row in results:
         id.append(row[])
         name.append(row[])
         explain.append(row[])
 except:
     print("出错了！")
 db.close()

2.写入数据库

 import pymysql
 id=[]
 name=[]
 explain=[]
 db=pymysql.Connection(host="localhost",port=,user="root", password="root",database="jiansuo",charset="utf8")
 cursor=db.cursor()
 sql="select * from yuan"
 try:
     cursor.execute(sql)
     results=cursor.fetchall()
     for row in results:
         id.append(row[])
         name.append(row[])
         explain.append(row[])
 except:
     print("出错了！")
 db.close()