Simplify imports

[ericbn]

No need to re-import datetime as datetime_lib inside __init__, just import it as that in the outer scope once.
Import the typing members directly.

[tasn]

Hey @ericbn, thanks for the contributions! These changes are unfortunately very subjective, and they are different to our stylistic choices at Svix. We follow the t for typing and prefer not to rename when importing. So the previous version is more suitable for us.

[ericbn]

We follow the t for typing and prefer not to rename when importing.

Hi @tasn. I sure can revert the changes in the typing import.

Regarding not renaming, you're already doing from datetime import datetime as datetime_lib inside __init__, because the argument is called datetime. I'd argue it's simpler to do that same from datetime import datetime as datetime_lib in the main scope, instead of hiding the first datetime import with the datetime argument and then importing datetime as datetime_lib every time again inside __init__.

EDIT: Just reverted the changes to the typing import.

[svix-jbrown]

@ericbn I don't think this is necessary any more under the current latest release; I independently made an equivalent change in #31. Sorry for the very slow turnaround!

[ericbn]

Cool, for your consideration this could be a good fit to still further refactor the existing code: https://adamj.eu/tech/2019/09/12/how-i-import-pythons-datetime-module/

It's even mentioned and suggested in https://docs.python.org/3/library/datetime.html