pymysql模块:连接mysql数据库的模块[Python基础]

python

pymysql模块

  pymysql是一个连接mysql数据库的第三方模块,可作为连接mysql数据库的客户端,对数据库进行增删改查操作

# 下载第三方模块:pip3 install pymysql

  

  如何连接数据库并对数据库进行操作:

# 1.连接数据库

"""

需要传入的参数:

host=None,

user=None,

password="",

database=None,

port=0,

charset="",

autocommit=True # 默认提交

"""

client = pymysql.connect(

host="127.0.0.1",

port=3306,

user="root",

password="123",

database="test",

charset="utf8", # 一定不要写utf-8

autocommit=True

)

# print(client) # 打印结果:<pymysql.connections.Connection object at 0x00000000028A8B88>

# 2.获取游标对象。游标:可以用来提交sql命令

cursor_obj = client.cursor(pymysql.cursors.DictCursor)

# 3.通过execute可以提交sql语句(增删改查都可以,可以使用try来捕获异常)

try:

# 1)查数据

sql = "select * from books"# 输入sql语句,不用写分号

# 2)插入数据

# sql = "insert into student(id, name, sex, birthday, class) values("110", "张芳", "男", "1946", "95030")" # 不用写分号

# 提交sql语句

cursor_obj.execute(sql)

# 提交后,通过cursor_obj对象.fetchall()获取所查询到的结果

data = cursor_obj.fetchall()

for i in data:

print(i)

except Exception as e:

print(e)


# 关闭游标

cursor_obj.close()

# 关闭客户端连接

client.close()

  执行结果(以下为我本地数据库的数据):

{"BookID": 11425, "BookTitle": "Python", "Copyright": 1984}

{"BookID": 12786, "BookTitle": "Java", "Copyright": 1934}

{"BookID": 13331, "BookTitle": "MySQL", "Copyright": 1919}

{"BookID": 14356, "BookTitle": "PHP", "Copyright": 1966}

{"BookID": 15729, "BookTitle": "PERL", "Copyright": 1932}

{"BookID": 16284, "BookTitle": "Oracle", "Copyright": 1996}

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