How to use selenium to return to the previous window?

Question

Python

Hello!
There is an order form. The user fills in all required fields. Presses the Save button and then pops up in separate tabs (I use chrome as the main browser) 2 tabs - on one contract in pdf, on the other payment in pdf. How to return to the main window using selenium or some other tools?

Answer 1

driver.switch_to_window(id_windows) - switch to window
driver.window_handles - list of all windows