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Self-naming parameter naming

In Python, this code is valid:

class A:

    def __init__(me):
        me.foo = 17

    def print_foo(myself):
        print(myself.foo)

    def set_foo(i, v):
        i.foo = v

As you already noticed, the parameter selfhas a name mein the method __init__, myselfin the method print_fooand iin the method set_foo.

Is there a situation where assigning a parameter selfto something other than selfuseful? If not, why does Python allow this, since it is certainly a way to write code that is difficult to read and maintain, and also a source of confusion?

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4 answers

PEP 8 pretty clearly describes this:

Always use self for the first argument to instance methods.

Always use cls for the first argument to class methods.

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Guido van Rossum . Spesifically:

I see no reason with this proposal to make "I" a reserved word or to require that the prefix name be exactly "I".

This is just an agreement, and it's nice to stick to it.

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