python操作mysql数据库之查询数据库

短命女 2021-09-29 09:34 429阅读 0赞

在用Python操作MySQL数据库之前，需先安装第三方库，我这里用的是pymysql：

pip install pymysql

还有其他第三方库如：mysqldb。可以在官网下载：https://pypi.org/

1 # coding=utf-8
     2 import pymysql
     3 
     4 class Mysql_search():
     5     def __init__(self):
     6         try:
     7             self.conn = pymysql.connect(host="192.168.1.86",
     8                                    user="root",
     9                                    password="pwd123",
    10                                    db="TEST",
    11                                    charset="utf8")
    12 
    13             self.cursor = self.conn.cursor()
    14         except pymysql.err as e:
    15             print("error" % e)
    16 
    17     def get_one(self):
    18         sql = "select * from api_test where method = %s order by id desc"
    19         self.cursor.execute(sql, ('post',))
    20         # print(dir(self.cursor))
    21         # print(self.cursor.description)
    22         # 获取第一条查询结果，结果是元组
    23         rest = self.cursor.fetchone()
    24         # 处理查询结果，将元组转换为字典
    25         result = dict(zip([k[0] for k in self.cursor.description], rest))
    26         self.cursor.close()
    27         return result
    28 
    29     def get_all(self):
    30         sql = "select * from api_test where method = %s order by id desc"
    31         self.cursor.execute(sql, ('post',))
    32         # 获取第一条查询结果，结果是元组
    33         rest = self.cursor.fetchall()
    34         # 处理查询结果，将元组转换为字典
    35         result = [dict(zip([k[0] for k in self.cursor.description], row)) for row in rest]
    36         self.cursor.close()
    37         return result
    38 
    39     def db_close(self):
    40         self.conn.close()
    41 
    42 
    43 if __name__ == '__main__':
    44     obj = Mysql_search()
    45     # result = obj.get_one()
    46     # print(result)
    47     # print(result['url'])
    48     reslt = obj.get_all()
    49     for item in reslt:
    50         print(item)
    51         print("-"*10)
    52     obj.db_close()

转载于:https://www.cnblogs.com/dudubao/p/9687499.html