control structures (was "Re: Sins")

[Darrell]

From: "skaller" <skaller at maxtal.com.au>
> What would be 'generally' useful is a genuine switch 
> statement -- a sort of unrolled dictionary whose values
> are pieces of code. Syntax?
> 
> switch x:
> case 1: ..
> case 2: ...
> default: ...
> 
> like C, except that each handler has an implicit
> break at the end of the handler suite (no fall through,
> like in C).
> 
> Comments?

This is a common thing, does this express the idea ? 

def one(arg):
    print 'ARGV:', arg,
    return 'RetVal'

def two(arg):
    print 'ARGV:', arg,
    return 'RetVal'

states={1:one, 2:two, 3:3}

def switch(state, args, stateTable, default=None):
    val=stateTable.get(state,default)
    if callable(val):
        return val(args)
    return val

for x in range(5):
    print 'State:', x, `switch(x, "argVal", states)`

####### Output
State: 0 None
State: 1 ARGV: argVal 'RetVal'
State: 2 ARGV: argVal 'RetVal'
State: 3 3
State: 4 None

--Darrell