[Python-Dev] Switch statement

Ka-Ping Yee python-dev at zesty.ca
Wed Jun 21 10:38:57 CEST 2006

On Wed, 21 Jun 2006, Phillip J. Eby wrote:
> Well, EIBTI and all that:
>      switch x:
>          case == 1: foo(x)
>          case in S: bar(x)
> It even lines up nicely.  :)

Hmm, this is rather nice.  I can imagine possible use cases for

    switch x:
        case > 3: foo(x)
        case is y: spam(x)
        case == z: eggs(x)

An interesting use case for which this offers no corresponding
syntax is

        case instanceof ClassA: ham(x)

which doesn't work because Python spells a type test as
isinstance(a, b) rather than with an operator.  (I suppose
whether we want it to be an operator might be another
question to think about for Python 3000.)

-- ?!ng

More information about the Python-Dev mailing list