Trey Hunner 🐍Extending a list in #Python
>>> a = []
>>> a.extend([2, 1]) # neat
>>> a += [3, 4] # hmm ok
>>> a += (7, 11) # huh?
>>> a[-1:] += [18, 29] # uh oh
>>> a[:] = [*a, 47, 76] # 😦
>>> a
[2, 1, 3, 4, 7, 11, 18, 29, 47, 76]
Exec@treyhunner Not knowing python, I expected the line starting with a[:] to behave as "add {list 'a'}, 47, 76 to list 'a'"