As a Python main I'm wondering if the difference has to do with a strictly typed language like the author's two examples, Go and Java, requiring more boilerplat

As a Python main I'm wondering if the difference has to do with a strictly typed language like the author's two examples, Go and Java, requiring more boilerplate and interface classes and so on, that in turn require more customization of the mock (since he writes that it "implements the API of what it replaces" which seems like it would be a strange thing to say about a python mock).