Difference between ''cls'' and ''self'' in Python classes?
Why is cls sometimes used instead of self as an argument in Python classes? For example: class Person: def __init__(self, firstname, lastname): self rstname = firstname self.
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
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When to use self, &self, &mut self in methods?
Self is an alias for the type that the impl block is for. The rules of ownership and borrowing apply to self as they apply to any other parameter (see e.g. this answer). Examples
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When do you use ''self'' in Python?
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
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Why do I get "TypeError: Missing 1 required positional argument:
See Why do I get ''takes exactly 1 argument (2 given)'' when trying to call a method? for the opposite problem.
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Python class methods: when is self not needed
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
Difference between this and self in JavaScript
Everyone is aware of this in javascript, but there are also instances of self encountered in the wild, such as here So, what is the difference between this and self in