The new keyword-only arguments look great, but it looks like it relies on adding a " * " parameter that allows any number of arguments. What if I want the safety of keyword-only arguments, but I don't want varargs? Is there a way to do that?
def foo(*, x=None, y="")
This is a very good feature, but a weird syntax!
Almost every time I see something introduced in Python 3 I have an impression that current Python envies Perl its baroque semantics, except that Perl usually tries to guess what the programmer meant, while with Python the relationship is reversed: the programmer needs to guess what the language wants.
Python's main selling point was simplicity of syntax and semantics that preserved its high-level language status. This simplicity is no longer present in 3.x line.
Hint: Cannot be counted on two hands.