Discussion on: Pythonic way to aggregate or group elements in a list using dict.get and dict.setdefault

[Pacharapol Withayasakpunt]

This is just too magical, and hard to understand.

items_by_type = {}
for item in items:
    items_by_type.setdefault(item.type, list()).append(item)

A less magical version is defaultdict (from collections)

items_by_type = defaultdict(list)
for item in items:
    items_by_type[item.type].append(item)

[Micheal Ojemoron]

You are right😁, fortunately there are several ways to do things in Python. I am more concerned about using dictionary methods. Thank you

[Waylon Walker]

Diddo the swap from

for i in range(len(items)):
   ...

to

for item in items:
   ...

[Micheal Ojemoron]

you are absolutely right, I have updated the code. Thanks