TypeError: __init__() missing 3 required positional arguments

[Pythonhelp82]

This should work.

class JuniorMember(Member):
    def __init__(self, MemberName, MemberID, SubscriptionPaid):
        super().__init__(MemberName, MemberID, SubscriptionPaid)
        self.DateOfBirth = ""

PS: I forgot to hit the post button :-/

I remember trying that too and it resulted in the same error:
TypeError: __init__() missing 3 required positional arguments: 'MemberName', 'MemberID', and 'SubscriptionPaid'

---

It's Java written in Python,it's not your fault we see this often in education when have teacher that's come from a Java/C++ background.

Just to show how it could be written in more pythonic way.
Remove getters/setters and __(is not private,it's name mangling that's not needed here), PEP-8

class Member() :
    def __init__(self, member_name, member_id, subscription_paid):
        self.member_name = member_name
        self.member_id = member_id
        self.subscription_paid = subscription_paid

class JuniorMember (Member):
    def __init__(self,member_name, member_id, subscription_paid, date_of_birth):
        super().__init__(member_name, member_id, subscription_paid)
        self.date_of_birth = date_of_birth

Test usage:

>>> new_member = JuniorMember('Ali', 12345, True, "12/11/2001")
>>> new_member.member_name
'Ali'
>>> new_member.date_of_birth
'12/11/2001'.

>>> an_other_member = JuniorMember('Tom', 4444, True, "1/2/2018")
>>> an_other_member.member_id
4444
>>> an_other_member.subscription_paid
True

>>> regular_member = Member('Kent', 9999, True)
>>> regular_member.member_name
'Kent'

But i don't want to give all data at once,use getters/setter?
No it's simple attribute access,have to prove that need more that,if need more @property can be used.
Use default arguments.

def __init__(self,member_name='', member_id='', subscription_paid='', date_of_birth=''):

>>> new_member = JuniorMember()
>>> new_member.date_of_birth = '12/11/2001'
>>> new_member.date_of_birth
'12/11/2001'

This is a fantastic break down and very useful for a beginner and something I will be using definitely, however, I think the purpose of the task is to demonstrate set methods:
• SetMemberName
• SetMemberID
• SetSubscriptionPaid

TypeError: __init__() missing 3 required positional arguments: 'MemberName', 'MemberID', and 'SubscriptionPaid'