Mandatory indenting (Was: Vote on PEP 308: Ternary Operator)

[Clark C. Evans]

>From my usage pattern, what is missing in python is a clear way
to indicate (for the reader) a conditional assignment.  Certainly
this is possible, but it isn't that easy to read:

   if quantity > 0: exit = "door"
   else: exit = "doors"

I'd rather have something like...

   exit = (if quantity > 0: 'door'
           else: 'doors')

However, the idea of moving the 'else' part onto the 1st line
is where it gets ugly and where I cry uncle.  Here are the 
examples with mandatory parens and new line...

   x = "door" + (if quantity > 1: 's'
                 else: '')

   data = (if hasatttr(s, 'open'): 
               s.readlines()
           else:
               s.split()
          )

   z = 1.0 + (if abs(z) < .0001: 0
              else: z)

   t = v[index] = (if t <= 0:
                       t-1.0
                   else:
                       -sigma / (t+1.0)
                  )

   return (if len(s) < 10: linesort(s)
           else: qsort(s))


I think that these are probably more clear than the
traditional if/else statement. 

Clark
P.S.  That said, I like the previous select/case proposal better.