PEP308: Proposing function-call syntax

[Anders J. Munch]

Yet-another PEP 308 proposal: 
    ifelse(condition, iftrue, iffalse)

That is, use plain old function call notation, but with 'ifelse' being
a keyword recognised by the interpreter, so that arguments are only
evaluated as necessary.

Example:
  messsage = "Access " + ifelse(key=correct_key, "granted", "denied")

Pro: 
Syntax is straightforward yet terse.
Order of evaluation left-to-right.
There's no confusing it with a statement.
'ifelse' is easy for newbies to search for in documentation.

Con:
Looks like a function call but isn't.  People might expect arguments
to be fully evaluated.
Adds new keyword.

A possible variation: Call it 'cond' instead and allow for multiple
conditions.
    cond(cond1, expr1, ..., condN, exprN, exprOtherwise)

- Anders