In simple words, generators are a way of creating iterators. A generator is a function that returns an object that can iterate over in a fast, easy, and clean way. You can use it with a for a statement or use the next function.
1 2 3 4 5 6 7 8 9 10 11 | def aGen(n): yield n yield n + 1 for n in aGen(4): print(n) |
As you can see, in the above code: aGen() is a function that yields n and n+1. Rather than that we can use the expression to create a generator:
1 2 3 | a = (x * x for x in range(100))print(sum(a)) |
As I mentioned, we can use the next function as well:
1 2 3 | g = (n for n in range(3, 5))g.next() |