[Python-ideas] Dict-like object with property access

Wed Feb 1 14:32:45 CET 2012

Using x:[....] wouldn't it create ambiguities when parsing (lambda x:[....])?
How about x. as a shortcut for x.__dict__ so we can do
x.key -> x.__dict__['key'] 
x.[key] -> x.__dict__[key]
x..keys() -> x.__dict__.keys()
x..values() -> x.__dict__.values()
for attribute in x.:
 print 'x.'+attribute
and leave open the possibility of 3 dots for for ranges
1...5 -> range(1,5)
1,2...10 -> range(1,10,2-1)
On Feb 1, 2012, at 7:05 AM, Paul Moore wrote:
> On 1 February 2012 11:33, Joao S. O. Bueno <jsbueno at python.org.br> wrote:
>> Still, there should be something with a closing token.
>> Try to imagine three of these in a chain, if the syntax is a colon:
>>>> name1:name2:name3:name4 -> which could mean either of:
>>>> name1:(name2:(name3:name4)), (name1:name2):(name3.name4)
>> and so on - (not to mention other expressions involving names, though these
>> would be less ambiguous due to to operator precedence.
>> No more so than a.b.c.d.e
>> I would expect a:b to behave exactly the same as a.b, Except that it
> uses getitem rather than getattr under the hood (was that the
> proposal? I'm completely confused by now as to what this new syntax is
> intended to achieve...)
>> But I don't like the idea in any case, so I remain -1 on the whole proposal.
>> Paul.
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