Python Issue 17587: Have all core library modules imported by default

Annoying when an actually good idea gets buried in a joke.

    ; python
    >>> dir(csv)[0]
    NameError: name 'csv' is not defined
    >>> import csv
    >>> dir(csv)[0]
    'Dialect'

Really, you know exactly where 'csv' is, but didn't want to even suggest it in the error message?

Man, this has been an uninspired April Fool's Day so far Though, I can't complain too much, I've not contributed anything to the cause... that I know of.