what is lambda used for in real code?
Steven Bethard
steven.bethard at gmail.com
Fri Dec 31 17:53:42 EST 2004
Hans Nowak wrote:
> Adam DePrince wrote:
>
>> In sort, we must preserve the ability to create an anonymous function
>> simply because we can do so for every other object type, and functions
>> are not special enough to permit this special case.
>
>
> Your reasoning makes sense... lambda enables you to create a function as
> part of an expression, just like other types can be part of an
> expression. However, by that same reasoning, maybe classes aren't
> special enough either to warrant a special case. Where's the keyword to
> create an anonymous class? :-)
Well, no keyword, but you can use the type function:
py> d = dict(c=type('C', (object,), dict(spam=42)),
... d=type('D', (dict,), dict(badger=True)))
py> d['c'].spam
42
py> d['c']()
<__main__.C object at 0x063F2DD0>
Steve
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