Python builder definition

With list generation, we can create a list directly. However, because of memory limitations, the list
The capacity is certainly limited. Also, create a list of 1 million elements that not only occupy a
Large storage space, if we just need to access the first few elements, then most of the elements behind
The space occupied is wasted. So, if the list element can be inferred by an algorithm
, can we continue to extrapolate the subsequent elements in the process of looping? So you don't have to
Create a complete list, saving a lot of space. In Python, this side loop computes
mechanism, called the generator: Generator.

Python builder definition