"if {negative}" vs. "if {positive}" style

[Ethan Furman]

Tim Chase wrote:
> Any thoughts on how others make the choice?
> 
> -tkc

If one branch is only a few lines, it comes first.  As often as not, 
that tiny branch is checking for errors, and the "else" branch doesn't 
need to be indented.

def func(arg1):
     if arg1 is 'stupid':
         raise ValueError("that's a stupid argument!")
     do_something
     do_something_else
     etc, etc


~Ethan~