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by Hans Nowak.
Original Post: New generator proposal
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PEP 289 has seen a revival. It was announced on c.l.py today: In brief, the PEP proposes a list comprehension style syntax for creating fast, memory efficient generator expressions on the fly: sum(x*x for x in roots) min(d.temperature()*9/5 + 32 for d in days) Set(word.lower() for word in text.split() if len(word) dict( (k, somefunc(k)) for k in keylist ) dotproduct = sum(x*y for x,y in itertools.izip(xvec, yvec)) bestplayer, bestscore = max( (p.score, p.name) for p in players ) Each of the above runs without creating a full list in memory, which saves allocation time, conserves resources, and exploits cache locality. ... [418 words]
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