This Python quiz question is about default parameter values and unexpected behavior when mutable objects like lists are used as default values. A: is the correct answer. The key point here is that ...

Contribute to luisforni/Data-Science-Python development by creating an account on GitHub. ... you will call the function by not passing a value to one of the default arguments - see how that ... # ...

When you call func(1), it uses the default value for y, which is an empty list []. The function appends 1 to y, making y = [1]. When you call func(2), it again uses the default list y, which is now [1 ...

The other is to store values to match as keys in a dictionary, then use the values to take an action—e.g., store a function as a value and use the key or some other variable as input.