Code formatting question: conditional expression

[Bruno Desthuilliers]

Richard Brodie a écrit :
> "John Posner" <jjposner at optimum.net> wrote in message 
> news:mailman.26.1250604346.2854.python-list at python.org...
> 
>>  if total > P.BASE:
>>      excessblk = Block(total - P.BASE, srccol, carry_button_suppress=True)
>>  else:
>>      excessblk = None
> 
> I wonder if it is appropriate to replace the None sentinel with one that is an instance
> of Block() e.g.
> 
> size = total - P.BASE
> excessblk = Block(size, srccol, carry_button_suppress=True, empty_block=(size <= 0) )

In which case the last param is possibly redundant - the Block object 
knows its size, so it might be able to know by itself if it's empty.

NB : please notice the 'possibly' and 'might' cautions !-)