[Python-Dev] Py3k: Except clause syntax (original) (raw)

Gareth McCaughan gmccaughan at synaptics-uk.com
Mon Mar 20 07:00:02 CET 2006

On Friday 2006-03-17 05:04, Alex Martelli wrote:

Hmmm, if we allowed '( as )' for generic expr's we'd make a lot of people pining for 'assignment as an expression' very happy, wouldn't we...?

I hope not. It looks a lot more like a binding construct than an assigning one. But what about "pattern-matching"? Currently, you can say

def f((x0,y0), (x1,y1)):
    ...

but wouldn't if be nice if you could say

def f((x0,y0) as p0, (x1,y1) as p1):
    ...

and have both the "packed" and "unpacked" forms available? (Prior art: some functional languages that let you define a function with multiple "pattern-matching" clauses have a similar feature.)

-- g

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