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# Lesson 3- using coroutines

An await - \
will block anything which is to be executed next

asyncio.sleep() - is always atleast how long you are going to wait due to asynchronous nature

![](/files/-MiNOhTW56nzlfv8nAf2)

difference b/w async function and coroutines

calling await is actually a coroutine

* How the crawling was designed to reduce latency of one thing to another