27045cac6e
* add unittests for mqtt.py * add mock * move test requirements into a file * fix unit tests * fix formating * initial version * fix SonarQube warning
15 lines
413 B
Python
15 lines
413 B
Python
from weakref import WeakValueDictionary
|
|
|
|
|
|
class Singleton(type):
|
|
_instances = WeakValueDictionary()
|
|
|
|
def __call__(cls, *args, **kwargs):
|
|
# logger_mqtt.debug('singleton: __call__')
|
|
if cls not in cls._instances:
|
|
instance = super(Singleton,
|
|
cls).__call__(*args, **kwargs)
|
|
cls._instances[cls] = instance
|
|
|
|
return cls._instances[cls]
|