Sololearn Python Challenge question

Question

Hi,

I got this question today that I can't figure out

t = (n for n in range(5))
if type(t) == tuple:
print(len(t))
else: print(next(t))

1) Why isn't the type tuple? It has round brackets.
2) What does next function do?

Fyi the output of this is 0

Answer 1

1) It's a generator.

t = (n for n in range(5))
print(type(t))

will give you the following output: <class 'generator'>

2) next() function will return the next item in an iterator. Given that t contains (0,1,2,3,4), your next item is considered as 0.