python資料庫封裝的辦法

#

匯入pymysql
框架，可以用
pipimport pymysql
#資料庫封裝方法
class mysqlhelp(object):
config=
def 
__init__(self):
self.connection=none
self.cursor=none
#該函式用來從資料庫表中查詢一行資料
def 
getone(self
,sql,*args):
try:
self.connection = pymysql.connect(**mysqlhelp.config)
self.cursor=self.connection.cursor()
self.cursor.execute(sql,args)
return 
self.cursor.fetchone()
except 
exception 
as ex:
print(ex,ex)
finally:
self.close()
def 
close(self):
if(self.cursor):
self.cursor.close()
if(self.connection):
self.connection.close()
#該函式用來從資料庫表中查詢多行資料
def 
getlist(self
,sql,*args):
try:
self.connection = pymysql.connect(**mysqlhelp.config)
self.cursor=self.connection.cursor()
self.cursor.execute(sql,args)
return 
self.cursor.fetchall()
except 
exception 
as ex:
print(ex,ex)
finally:
self.close()
# 該函式用來從資料庫表中查詢多行資料
def 
executedml(self
, sql, *args):
try:
self.connection = pymysql.connect(**mysqlhelp.config)
self.cursor = self.connection.cursor()
#返回sql
語句執行以後影響的行數
num = self.cursor.execute(sql, args)
self.connection.commit()
return num
except 
exception 
as ex:
self.connection.rollback()
print(ex, ex)
finally:
self.close()
def 
close(self):
if(self.cursor):
self.cursor.close()
if(self.connection):
self.connection.close()
if __name__=='__main__':
helper=mysqlhelp()
#輸入操作內容
print(helper.executedml('delete from t_student where id=%d'%6))

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