Top "Defaultdict" questions

A subclass of Python's dict class that allows to specify a default factory to use for missing keys.

Difference between defaultdict(lambda:None) and defaultdict(int)

What exactly does the TYPE lambda do when used with defaultdict? I have this example and works fine even for …

python lambda defaultdict
Surprising results with Python timeit: Counter() vs defaultdict() vs dict()

I obtained very surprising results with timeit, can someone tell me if I am doing something wrong ? I am using …

python python-2.7 counter timeit defaultdict
Is the defaultdict in Python's collections module really faster than using setdefault?

I've seen other Python programmers use defaultdict from the collections module for the following use case: from collections import defaultdict …

python collections defaultdict setdefault python-collections
Python Dict Comprehension to Create and Update Dictionary

I have a list of dictionaries (data) and want to convert it into dictionary (x) as below. I am using …

python dictionary append defaultdict dictionary-comprehension