Python MySQL和上下文管理器:_退出_属性错误
使用Python2.7.9,我试图计算mysql连接和游标的打开和关闭 代码是Python MySQL和上下文管理器:_退出_属性错误,python,mysql,python-2.7,contextmanager,Python,Mysql,Python 2.7,Contextmanager,使用Python2.7.9,我试图计算mysql连接和游标的打开和关闭 代码是 class MySQLCursor: def __init__(self, commit=False): self.commit = commit def __enter__(self): self.conn = MySQLdb.connect(host=_MYMYSQLHOST, user=_M
class MySQLCursor:
def __init__(self, commit=False):
self.commit = commit
def __enter__(self):
self.conn = MySQLdb.connect(host=_MYMYSQLHOST,
user=_MYMYSQLUSER,
passwd=_MYMYSQLPASSWD,
db=_MYMYSQLDB)
self.cursor = self.conn.cursor()
return self.cursor
def __exit__(self, exc_type, exc_val, exc_tb):
if self.commit:
self.conn.commit()
self.cursor.close()
self.conn.close()
return
将其用作
with MySQLCursor as cursor:
cursor.execute("SELECT VERSION()")
row = cursor.fetchone()
print "server version:", row[0]
我收到了错误信息
AttributeError: __exit__
这是mysql问题还是上下文管理器问题?只需使用MySQLCursor()作为游标执行
:
-with语句需要使用\uuuuuuuuuuuuuuuuu
和\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu>方法的类实例,而不是类本身。尝试使用MySQLCursor()作为游标