How to use generator to save memory in python

This article mainly introduces python how to use generator to save memory, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Generator saves memory

Earlier, I showed you list comprehension. But lists are not always the best choice. Suppose we have a very large list of 10000 items that we want to calculate the sum of all the items. Of course, we can use lists to do this, but we may encounter memory problems. This is a perfect example of how we can use a generator. Similar to list comprehension, we can use the generator to understand that it has the same syntax, but uses parentheses instead of square brackets. The generator lazily calculates our elements, that is. Which generates only one entry at a time and only when requested If we calculate the sum of this generator, we see that we get the same correct result.

# list comprehension my_list = [i for i in range (10000)] print (sum (my_list)) # 49995000 # generator comprehension my_gen = (i for i in range (10000)) print (sum (my_gen)) # 49995000 Thank you for reading this article carefully. I hope the article "python how to use generator to save memory" shared by the editor will be helpful to you. At the same time, I hope you will support me and pay attention to the industry information channel. More related knowledge is waiting for you to learn!