How add() on set can work in such dictionary?

Asked Oct 17 '19 at 19:03

Active Oct 17 '19 at 19:04

Viewed 33 times

I struggle to understand the following code, how can add() apply to the set in the following dictionary:

for word in tokenize(name):
    index.setdefault(word, set()).add(char)

"add()" is method of set and not a method of dictionary. So how can it be that is adding values to the set in a dictionary?

how can the method .add(char) be

edited Oct 17 '19 at 19:04

Sraw

asked Oct 17 '19 at 19:03

toto'

2

[What does `index.setdefault(word, set())` return?](https://docs.python.org/3.7/library/stdtypes.html#dict.setdefault) – ForceBru Oct 17 '19 at 19:05
1

`setdefault()` returns the value being added to the dictionary, not the dictionary. – Barmar Oct 17 '19 at 19:05
ok so it returns a set to which I can add values. thanks lot! – toto' Oct 17 '19 at 19:08

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