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python连接数据库
安装数据库
安装pymysql或者安装mysqlclient
#实例
import MySQLdb
try:
#获取连接
conn=MySQLdb.connect(host='localhost',port=3306,db='test1',user='root',passwd='mysql',charset='utf8')
#创建游标
cs1=conn.cursor()
#执行语句
count=cs1.execute("insert into students(sname) values('张良')")
print count
conn.commit()
cs1.close()
conn.close()
except Exception,e:
print e.message
封装成utils.py
#encoding=utf8
import MySQLdb
class MysqlHelper():
def __init__(self,host,port,db,user,passwd,charset='utf8'):
self.host=host
self.port=port
self.db=db
self.user=user
self.passwd=passwd
self.charset=charset
def connect(self):
self.conn=MySQLdb.connect(host=self.host,port=self.port,db=self.db,user=self.user,passwd=self.passwd,charset=self.charset)
self.cursor=self.conn.cursor()
def close(self):
self.cursor.close()
self.conn.close()
def get_one(self,sql,params=()):
result=None
try:
self.connect()
self.cursor.execute(sql, params)
result = self.cursor.fetchone()
self.close()
except Exception, e:
print e.message
return result
def get_all(self,sql,params=()):
list=()
try:
self.connect()
self.cursor.execute(sql,params)
list=self.cursor.fetchall()
self.close()
except Exception,e:
print e.message
return list
def insert(self,sql,params=()):
return self.__edit(sql,params)
def update(self, sql, params=()):
return self.__edit(sql, params)
def delete(self, sql, params=()):
return self.__edit(sql, params)
def __edit(self,sql,params):
count=0
try:
self.connect()
count=self.cursor.execute(sql,params)
self.conn.commit()
self.close()
except Exception,e:
print e.message
return count
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django 使用mysql
setting.py
'default': {
'ENGINE': 'django.db.backends.mysql', # 数据库引擎
'NAME': 'mydb', # 你要存储数据的库名,事先要创建之
'USER': 'root', # 数据库用户名
'PASSWORD': '1234', # 密码
'HOST': 'localhost', # 主机
'PORT': '3306', # 数据库使用的端口
}
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trndado 使用数据库
安装torndb
pip install torndb
初始化
import torndb
class Application(tornado.web.Application):
def __init__(self):
handlers = [
(r"/", IndexHandler),
]
settings = dict(
template_path=os.path.join(os.path.dirname(__file__), "templates"),
static_path=os.path.join(os.path.dirname(__file__), "statics"),
debug=True,
)
super(Application, self).__init__(handlers, **settings)
# 创建一个全局mysql连接实例供handler使用
self.db = torndb.Connection(
host="127.0.0.1",
database="itcast",
user="root",
password="mysql"
)