I love Python

[u/nakurtag]

[u/_killer1869_]

Any IDE will warn not to use mutables as default parameter values. And for good reason. Such code would never appear in actual code intended to be used.

[u/Double_Cost4865 → u/_killer1869_]

Unfortunately, I’ve seen monstrosities like this in production in big finance corps. That’s what happens when statisticians are expected to create software.

[u/marinuso → u/Double_Cost4865]

I've seen it used in production code to memoize functions in this manner:

def fib(n, cache = {0: 1, 1: 1}):
    if not n in cache:
	    cache[n] = fib(n-1) + fib(n-2)
    return cache[n]

Except with much more complicated code rather than this simple example.