[Tutor] multiple assignment

[Vincent Gulinao]

I was fascinated when I learned that I can do this in Python:

(str1, str2, str3, rest) = str.split(" ", 3)

Later that I realize that str could contain values of less than 4 strings,
in which case it would complain something like -- ValueError: unpack list of
wrong size.

Now I don't want to spoil the fun.

In essence, I'd like to capture the first 3 words in a string. If str is
less than 3 words then any or all of the containers could have a None value.

TIA.
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