我创建了一个类来管理我的连接,如下所示:
class DB(object):
def __init__(self):
JHOME = jpype.getDefaultJVMPath()
# ojdbc path should be added to classpath
jpype.startJVM(JHOME, r'-Djava.class.path=..\ojdbc8-full\ojdbc8.jar')
# Might need error handling here
self.conn = jaydebeapi.connect(
cfg.oracle['driver'],
cfg.oracle['url'],
[cfg.oracle['user'], cfg.oracle['pass']])
# destructor
def __del__(self):
self.conn.close()
print('connection destroyed')
def query(self, sql):
with self.conn.cursor() as cursor:
cursor.execute(sql)
return cursor.fetchall()
我全局实例化它一次,并有一些函数调用查询方法。看起来一切正常,但是我有一个函数可以在循环中调用使用查询方法的函数。所有查询都成功完成,但是给了我错误:
Exception ignored in: <function DB.__del__ at 0x00000000029ABB88>
Traceback (most recent call last):
File "file.py", line 33, in `__del__`
File "C:\Users\path\to\project\packages\jaydebeapi\__init__.py", line 437, in close
jpype._core.JVMNotRunning: Java Virtual Machine is not running
我认为该错误是在垃圾回收期间引发的。在处理此数据库连接类时我做错了什么?