To be sung to the tune of “Letter we got letters” from the old Perry Como show

Modules
We got moudules
We got lots and lots of moudules.
Dear Big Daddy
Would you be so kind
To fill a request…

Well, you get the general message. Any summary of module commands that I happen to assemble – or that somebody else happens to contribute.  Will be after this heading with the exception of any module specifically for the Raspberry Pi.  I think we will start with datetime .