Python Function Reference

setdefault

If key is in the dictionary, return its value. If not, insert key with a value of default and return default.

Python 3.13
dict.setdefault(key, default=None)

key

The key to look for/insert.

default

The default value.

Examples

Python 3.13
a = {'x': 1}
a.setdefault('y', 2)
2