解决pymysql一个connection多个游标时，执行不同语句获取数据相同的问题

cursor = conn.cursor()
sql1 = "select * from table_name1;"
cursor.execute(sql1)
relist1 = cursor.fetchall()

sql2 = "select * from table_name2;"
cursor.execute(sql2)
relist2 = cursor.fetchall()

打印relist1和relist2发现结果相同，这是因为一个连接connection同一个时间点只能有一个cursor，执行sql，并获取结果。

解决办法

cursor = conn.cursor()

def select(sql):
    cursor.execute(sql)
    relist = cursor.fetchall()
    return relist

sql1 = "select * from table_name1;"
relist1 = select(sql1)

sql2 = "select * from table_name2;"
relist2 = select(sql2)