positional-argument – Tarik Billa

Why do I get “TypeError: Missing 1 required positional argument: ‘self'”?

October 2, 2023 by Tarik

To use the class, first create an instance, like so: p = Pump() p.getPumps() A full example: >>> class TestClass: … def __init__(self): … print(“init”) … def testFunc(self): … print(“Test Func”) … >>> testInstance = TestClass() init >>> testInstance.testFunc() Test Func

What does a bare asterisk do in a parameter list? What are “keyword-only” parameters?

October 2, 2023 by Tarik

Bare * is used to force the caller to use named arguments – so you cannot define a function with * as an argument when you have no following keyword arguments. See this answer or Python 3 documentation for more details.