On 4/6/2010 9:20 PM Steven D'Aprano said...
On Tue, 06 Apr 2010 16:54:18 +0000, Duncan Booth wrote:
Most old hands would (IMHO) write the if statements out in full,
though some might remember that Python comes 'batteries included':
from bisect import bisect
WEIGHTS = [100, 250, 500, 1000]
STAMPS = [44, 60, 80, 100, 120]
...
stamp = STAMPS[bisect(WEIGHTS,weight)]
Isn't that an awfully heavyweight and obfuscated solution for choosing
between five options? Fifty-five options, absolutely, but five?
Would it be easier to digest as:
from bisect import bisect as selectindex #
WEIGHTLIMITS = [100, 250, 500, 1000]
POSTAGEAMOUNTS = [44, 60, 80, 100, 120]
postage = POSTAGEAMOUNTS[selectindex(WEIGHTLIMITS, weight)]
---
I've used bisect this way for some time -- I think Tim may have pointed
it out -- and it's been handy ever since.
Emile
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