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When do you use 'self' in Python? - Stack Overflow
Are you supposed to use self when referencing a member function in Python (within the same module)? More generally, I was wondering when it is required to use self, not just for methods but for

oop - What do __init__ and self do in Python? - Stack Overflow
In this case, there are some benefits to allowing this: 1) Methods are just functions that happen defined in a class, and need to be callable either as bound methods with implicit self passing or as plain functions with explicit self passing. 2) Making classmethod s and staticmethod s means you want to be able to rename and omit self respectively.

What is the purpose of the `self` parameter? Why is it needed?
For a language-agnostic consideration of the design decision, see What is the advantage of having this/self pointer mandatory explicit?. To close debugging questions where OP omitted a self parameter for a method and got a TypeError, use TypeError: method () takes 1 positional argument but 2 were given instead. If OP omitted self. in the body of the method and got a NameError, consider How can ...

sql - Explanation of self-joins - Stack Overflow
A self join is a join of a table with itself. A common use case is when the table stores entities (records) which have a hierarchical relationship between them.

What is SELF JOIN and when would you use it? [duplicate]
A self join is simply when you join a table with itself. There is no SELF JOIN keyword, you just write an ordinary join where both tables involved in the join are the same table. One thing to notice is that when you are self joining it is necessary to use an alias for the table otherwise the table name would be ambiguous. It is useful when you want to correlate pairs of rows from the same ...

Python class methods: when is self not needed - Stack Overflow
17 What is self? In Python, every normal method is forced to accept a parameter commonly named self. This is an instance of class - an object. This is how Python methods interact with a class's state. You are allowed to rename this parameter whatever you please. but it will always have the same value:

When to use self, &self, &mut self in methods? - Stack Overflow
Say I want to implement a method that pretty prints the struct to stdout, should I take &self? I guess self also works? As you can see, this is exactly a case for &self. If you use self (or &mut self) the method will likely still compile, but it can only be used in more restricted situations.

What difference does it make to use "self" to define a member in a ...
A.x is a class variable. B 's self.x is an instance variable. i.e. A 's x is shared between instances. It would be easier to demonstrate the difference with something that can be modified like a list:

Explaining the 'self' variable to a beginner - Stack Overflow
6 self refers to the current instance of Bank. When you create a new Bank, and call create_atm on it, self will be implicitly passed by python, and will refer to the bank you created.

Why do I get "TypeError: Missing 1 required positional argument: 'self'"?
See Why do I get 'takes exactly 1 argument (2 given)' when trying to call a method? for the opposite problem.