Let's now talk about the other techniques to generate values one at a time.
The syntax is exactly the same as list comprehensions, only, instead of wrapping the comprehension with square brackets, you wrap it with round brackets. That is called a generator expression.
In general, generator expressions behave like equivalent list comprehensions, but there is one very important thing to remember: generators allow for one iteration only, then they will be exhausted. Let's see an example:
# generator.expressions.py>>> cubes = [k**3 for k in range(10)] # regular list>>> cubes[0, 1, 8, 27, 64, 125, 216, 343, 512, 729]>>> type(cubes)<class 'list'>>>> cubes_gen = (k**3 for k in range(10)) # create as generator>>> cubes_gen
