這篇文章主要介紹了Python實現封裝MySQLdb基本操作類,小編覺得挺不錯的，現在分享給大家，也給大家做個參考。一起跟著小編過來看看吧
# -*- coding:utf-8 -*-
import MySQLdb
import datetime
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
#封装MySQLdb类基本操作mysqldb
class mysqldb:
conn = ''
cursor = ''
def __init__(self,host1='localhost',user1='root',passwd1='www',database1='test',charset1='utf8'):
try:
print 'init_ ok'
self.conn=MySQLdb.connect(host=host1,user=user1,passwd=passwd1,db=database1,port=3306,charset=charset1);
self.cursor = self.conn.cursor(MySQLdb.cursors.DictCursor)
except MySQLdb.Error,e:
error = 'Connect failed! ERROR (%s): %s' %(e.args[0],e.args[1])
print error
sys.exit()
#针对读操作返回结果集
def _exeCute(self,sql=''):
try:
self.cursor.execute(sql)
records = self.cursor.fetchall()
return records
except MySQLdb.Error,e:
error = 'MySQL execute failed! ERROR (%s): %s' %(e.args[0],e.args[1])
print error
#sys.exit()
#针对更新,删除,事务等操作失败时回滚
def _exeCuteCommit(self,sql=''):
try:
self.cursor = self.conn.cursor()
self.cursor.execute(sql)
self.conn.commit()
except MySQLdb.Error,e:
self.conn.rollback()
error = 'MySQL execute failed! ERROR (%s): %s' %(e.args[0],e.args[1])
print error
#sys.exit()
#创建表
#tablename:表名称,attr_dict:属性键值对,constraint:主外键约束
#attr_dict:{'book_name':'varchar(200) NOT NULL'...}
#constraint:PRIMARY KEY(`id`)
def _createTable(self,table,attr_dict,constraint):
sql = ''
sql_mid = '`id` bigint(11) NOT NULL AUTO_INCREMENT,'
for attr,value in attr_dict.items():
sql_mid = sql_mid + '`'+attr + '`'+' '+ value+','
sql = sql + 'CREATE TABLE IF NOT EXISTS %s ('%table
sql = sql + sql_mid
sql = sql + constraint
sql = sql + ') ENGINE=InnoDB DEFAULT CHARSET=utf8'
print '_createTable:'+sql
self._exeCuteCommit(sql)
#查询表内容
#cond_dict:{'name':'xiaoming'...}
#order:'order by id desc'
def _select(self,table,cond_dict='',order=''):
consql = ' '
if cond_dict!='':
for k,v in cond_dict.items():
consql = consql+k+'='+v+' and'
consql = consql + ' 1=1 '
sql = 'select * from %s where '%table
sql = sql + consql + order
print '_select:'+sql
return self._exeCute(sql)
#插入单条数据
def _insert(self,table,attrs,value):
#values_sql = ['%s' for v in attrs]
attrs_sql = '('+','.join(attrs)+')'
values_sql = ' values('+','.join(value)+')'
sql = 'insert into %s'%table
sql = sql + attrs_sql + values_sql
print '_insert:'+sql
self._exeCuteCommit(sql)
#插入多条数据
#attrs:[id,name,...]
#values:[[1,'jack'],[2,'rose']]
def _insertMany(self,table,attrs,values):
values_sql = ['%s' for v in attrs]
attrs_sql = '('+','.join(attrs)+')'
values_sql = ' values('+','.join(values_sql)+')'
sql = 'insert into %s'%table
sql = sql + attrs_sql + values_sql
print '_insertMany:'+sql
try:
print sql
#print values
for i in range(0,len(values),20000):
self.cursor.executemany(sql,values[i:i+20000])
self.conn.commit()
except MySQLdb.Error,e:
self.conn.rollback()
error = '_insertMany executemany failed! ERROR (%s): %s' %(e.args[0],e.args[1])
print error
sys.exit()
def _now(self):
now0 = datetime.datetime.now()
now = now0.strftime('%Y-%m-%d %H:%M:%S')
print now
def _close(self):
self.cursor.close()
self.conn.close()
def __del__(self):
self._close()if __name__ == '__main__':
a = mysqldb('localhost','root','www','test','utf8')
a._now()
table='test_mysqldb'
attrs={'name':'varchar(200) DEFAULT NULL','age':'int(11) DEFAULT NULL'}
constraint='PRIMARY KEY(`id`)'
a._createTable(table,attrs,constraint)
col = ['name','age']
val = ['\'xiegonghai\'','25']
a._insert('test_mysqldb',col,val)
print a._select(table)以上是Python實作封裝MySQLdb基本操作類的詳細內容。更多資訊請關注PHP中文網其他相關文章！
