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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
Python self keyword - Stack Overflow 9 First, Python's self is not a keyword, it's a coding convention, the same as Python's cls Guido has written a really detailed and valuable article about the origin of Python's support for class, and in that article, Guido explains why use self and cls, and why they are necessary
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
Purpose of return self python - Stack Overflow Returning self from a method simply means that your method returns a reference to the instance object on which it was called This can sometimes be seen in use with object oriented APIs that are designed as a fluent interface that encourages method cascading
How to avoid explicit self in Python? - Stack Overflow The "self" is the conventional placeholder of the current object instance of a class Its used when you want to refer to the object's property or field or method inside a class as if you're referring to "itself"
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: