If monkey patching is permitted in both Ruby and Python, why is it more controversial in Ruby?

Question

In many discussions I have heard about Ruby in which people have expressed their reservations about the language, the issue of monkey patching comes up as one of their primary c

Answer 1

In Python, any literal ("", {}, 1.0, etc) creates an instance of the standard class, even if you tried to monkeypatch it and redefined the corresponding class in your namespace.

It just won't work how you intended:

class str():
    # define your custom string type
    ...

a = "foo"      # still a real Python string
a = str("foo") # only this uses your custom class