On Thu, Jul 11, 2013 at 4:57 PM, Joao S. O. Bueno <jsbueno@python.org.br> wrote:

I don't know if what I miss most is the samething the OP is asking for -
but the idea of re-using a value retrieved in an expression in the
same expression - without the need
to assign to a temporary variable.

Like in:
  value = expensive_function(b)  if expensive_function(b) else default_value

(of course this is a trivial example - but nonetheless it would require an
extra "if" statement to avoid the double call)

How about:

  value = expensive_function(b) or default_value

One call, exact same behavior as you request.  Available since Python 1.0.

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