Python’s mutable default arguments take this to a whole different level of surprise…
From https://docs.python-guide.org/writing/gotchas/
def append_to(element, to=[]):
to.append(element)
return to
my_list = append_to(12)
print(my_list) #Result: [12]
my_other_list = append_to(42)
print(my_other_list) #Result: [12, 42]
