Great question — answering as the UphillTech team:
To understand what yield does, you must understand what generators are. And before you can understand generators, you must understand iterables . Iterables When you create a list, you can read its items one by one. Reading its items one by one is called iteration: >>> mylist = [1, 2, 3] >>> for i in mylist: ... print(i) 1 2 3 mylist is an iterable . When you use a list comprehension, you create a list, and so an iterable: >>> mylist = [x*x for x in range(3)] >>> for i in mylist: ... print(i) 0 1 4 Everything you can use " for... in... " on is an iterable; lists , strings , files... These iterables are handy because you can read them as much as you wish, but you store all the values in...
Full answer by Bite code: https://stackoverflow.stackexchange.com/a/231855 (CC BY-SA 4.0).
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