How can I detect if the user has double-clicked in pygame?

I know I can check if there was a left click

event.type == pygame.MOUSEBUTTONDOWN and event.button == LEFT

but how can I check if they double clicked? Also is there any way to check if the user moved the scroll wheel forward or backwards?

I've never used pygame - but:

• Detecting double clicks: at a guess, instead of processing each click immediately, apply a 50ms delay and see if you get another click event in that time. The user probably won't notice the 50ms delay.

• Distinguishing between scrollwheel up/down: see the comments on this documentation page. Apparently there are five buttons defined - left, middle, right, scrollwheel-up and scrollwheel-down. That is, you can capture scrollwheel events the same way you're capturing left clicks - you just need to look for SCROLL_UP or similar instead of LEFT.

  Look up the documentation to find out exactly what SCROLL_UP is called.