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Questions - defaultdict

How to sort default dict with list values in python

I have a defaultdict with list as defaultdict(<class 'list'>, {'SOL200122': ['125', '135', '145', '170', '120', '130', '140', '150', '160']} I want it to be sorted like defaultdict(<class 'l...
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Madan

python

list

defaultdict

Votes: 0

Answers: 2

Latest Answer

Use list.sort with key=int (thanks @Metapod, @deceze et al): for v in d.values(): v.sort(key=int) If you want a one-liner (which makes no sense in this case because for-loop is very nice), a mons...
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user7864386

A dataclass as a key to a defaultdict: KeyError

Please explain and maybe help how to fix defaultdict with a frozen dataclass key. Example: """Reproduce KeyError: defaultdict with dataclass keys""" import collections i...
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Tometzky

python

defaultdict

python-dataclasses

Votes: 0

Answers: 2

Latest Answer

collections.defaultdict(default_factory=int) creates a default dict with no default value type, and one value (the type int at the key "default_factory") because default_factory can only be ...
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Pranav Hosangadi

Is there a better way to merge two dicts of sets?

I am using this code to merge one dict into another - if a key exists, it should merge the values from both dicts: source_dict = defaultdict(set) target_dict = defaultdict(set) def merge_dict(source_...
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marlon

python

dictionary

defaultdict

Votes: 0

Answers: 2

Latest Answer

You are using defaultdicts. So you don't need the if/else... Just do: def merge_dict(source_dict, target_dict): for source_key, source_value in source_dict.items(): target_dict[source_key]...
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Tomerikoo

Default dict with a non-trivial default

I want to create a "default dict" that performs a non-trivial operation on the missing key (like a DB lookup, for example). I've seen some old answers on here, like Using the key in collect...
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zenzic

python

defaultdict

Votes: 0

Answers: 1

Latest Answer

What does defaultdict add? According to the documentation, the only difference between a defaultdict and a built-in dict is: It overrides one method and adds one writable instance variable. The one ...
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Tomerikoo

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