On woensdag, maart 6, 2002, at 07:23 , Raymond Hettinger wrote: > Here is the proposal in a nutshell: > =A0 > =A0=A0=A0 If a list comprehension starts with a 'yield' keyword, then > =A0=A0=A0 express the comprehension with a generator.=A0 For example: > > =A0=A0=A0=A0=A0=A0=A0 g =3D [yield (len(line),line)=A0 for line in = file=A0 if=20 > len(line)>5] > =A0=A0=A0=A0=A0=A0=A0 print g.next() > > =A0=A0=A0 This would be implemented as if it had been written: > > =A0=A0=A0=A0=A0=A0=A0 def __tempGenComp(self): > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 for line in file: > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 if len(line) > 5: > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 yield = (len(line), line) > =A0=A0=A0=A0=A0=A0=A0 g =3D __tempGenComp() > =A0=A0=A0=A0=A0=A0=A0 print g.next() +1. Now if you would please comment (or vote +1 or -1) on PEP 278 -=20 Allowing foreign newlines in text input files and modules=20 (universal newline support, for short) then that's another PEP=20 that could move forward. The code has been sitting there with=20 very minor mods for more than 4 months now:-( -- - Jack Jansen <Jack.Jansen@oratrix.com> =20 http://www.cwi.nl/~jack - - If I can't dance I don't want to be part of your revolution --=20 Emma Goldman -
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