Einstein summation notation (was: question of style)

[Paul Rubin]

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> It is very useful to be able to write e.g.:
> if header or body or footer:
>     print assemble_page(header, body, footer)
> and have empty strings to be equivalent to False.

Why doesn't assemble_page properly handle the case where header, body,
and footer are all empty?  That would let you eliminate the if.  "Make
sure your code 'does nothing' gracefully" (Kernighan and Plauger).