I saw this line of code by chance yesterday
from _collections import deque

I was looking at the python library documentation. When I saw collections, I went to find the source code of deque.
Then I looked for _collections, but it was not found in the Lib directory. Use the search file When I found the directory
Lib/site-packages/requests/packages/urllib3/_collections.py, but there was no code about deque in it, so I was curiousfrom _collections import deque, where did this _collections come from