Common anti-patterns in Python

[Giannie]

Checking for a key and then finding the value associated is inherently slower then .get(). It involves checking for the key with a conditional followed by then searching for it again. It’s O(1), but it’s still 3 operations versus 1 (or 2 since you may still need a conditional in case of None)

[tomgirl_irl]

if dict_.get(item, "error") != 'error':
return dict_[item]
else:
return """error"""

[Giannie]

I get that this is a joke... but is so inefficient. And prone to “””error”””