Since George Sakkis proposed a new way of doing list comprehensions
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/ac5023ad18b2835f/d3ff1b81fa70c8a7#d3ff1b81fa70c8a7
letting tuples-like objects (x,y,z=0) acting as functions on other tuples I wonder why this would not be a good starting point of rethinking anonymus functions?
In Georges proposition the action is
(x,y,z=0) -> (x,y,z)
i.e. mapping tuples on other tuples. This is equivalent to
lambda x,y,z=0:(x,y,z)
But regarding tuples as actions by means of an arrow "->" would generalize this idea:
Mappings like that:
((x,y),z) -> x+y-z
((x,y=0),z) -> None
should be valid actions too.
What is the audience thinking about that?
IMHO, it's just lambda in disguise, and I'm not sure it's more readable than lambda. You'll have to provide more arguments (sorry for the pun !-) to gain my adhesion. (NB : I could use this syntax without problem, it's just that we already have a syntax for this).
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bruno desthuilliers
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