Is the _ _ init__ method necessary to call in Python?

like the following code: 

class Test(object):
    __instance = None

    def __new__(cls, *args, **kwargs):
        if cls.__instance:
            return cls.__instance
        else:
            return object.__new__(cls)

    def __init__(self, value):
        self.value = value
        print("__init__")
        Singletone.__instance = self

sl = Test(100)
sl2 = Test(300)

print(sl.value)
print(sl2.value)

I guess the output is: 

__init__
100
100

however, the actual output is: 

__init__
__init__
300
300

Why?

Python
Mar.15,2021

Yes, even if _ _ new__ returns the generated object, _ _ init__ is bound to be executed;
the related code is as follows (python2.7) 

  
 is inevitable.

Previous: How to do exclude query by python sqlalchemy

Next: Wechat official account payment, reported that the payment signature verification failed, Wechat's online signature verification was passed. Is it a front-end error or a background interface error?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c29475-47eea.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c29475-47eea.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?