PEP 572: Python assignment expressions has been accepted

What is it? The link points to a discussion more deep than I’m willing to read.

It's a controversial PEP https://www.python.org/dev/peps/pep-0572/ which allows you to write Python like this:

    def foo():
        if n := randint(0, 3):
            return n ** 2
        return 1337


    [(x, y, x/y) for x in input_data if (y := f(x)) > 0]

Would've making regular assignment an expression broken too much existing code?

It's a voluntary design choice since the beginning of Python to avoid the very common mistake of doing:

    while continue = "yes":

instead of:

    while continue == "yes":

Those mistakes introduce bugs that are hard to spot because they don't cause an immediate error, linters can hardly help with them and even a senior can make them while being tired.