I'm trying to create a singleton pattern using metaclass. When i use __new__ method in metaclass it is not getting called when creating the object in it child class and returning the newly created object but when i use __call__ method in metaclass it works fine. I am using python 3.
Here is my code:
class meta_class(type):
_instance = {}
def __new__(cls, *args, **kwargs):
if cls not in cls._instance:
inst = cls._instance[cls] = super(meta_class,cls).__new__(cls,*args,**kwargs)
return inst
else:
return cls._instance[cls]
class example(metaclass=meta_class):
def __init__(self):
print("instance init")
o = example()
print(o)
p = example()
print(p)
Any help would be more appreciable.
