[Python-Dev] accumulator display syntax
barry at python.org
Tue Oct 21 18:07:22 EDT 2003
On Tue, 2003-10-21 at 17:59, Raymond Hettinger wrote:
> > I expect that most iterator comprehensions (we need a better term!)
> > are not stored in a variable but passed as an argument to something
> > that takes an iterable, e.g.
> > sum(len(line) for line in file if line.strip())
> That is somewhat beautiful.
Indeed, as is the term "generator expression" and the relegation to
syntactic sugar of list comprehensions.
> > We can quibble about whether double parentheses are needed
> I vote for not requiring the outer parentheses unless there is an
> adjacent comma.
I like that too. It mirrors other situations where the parentheses
aren't needed except to disambiguate syntax. In the above example,
there's no ambiguity.
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