Message220299
@pacosta, if Mark's answer is too abstract, here's a complete session showing that the result you got for gcd(2.7, 107.3) is in fact exactly correct:
>>> import fractions
>>> f1 = fractions.Fraction(2.7)
>>> f2 = fractions.Fraction(107.3)
>>> f1
Fraction(3039929748475085, 1125899906842624) # the true value of "2.7"
>>> f2
Fraction(7550566250263347, 70368744177664) # the true value of "107.3"
>>> fractions.gcd(f1, f2) # computed exactly with rational arithmetic
Fraction(1, 1125899906842624)
>>> float(_)
8.881784197001252e-16
But this will be surprising to most people, and probably useless to all people. For that reason, passing non-integers to gcd() is simply a Bad Idea ;-) |
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Date |
User |
Action |
Args |
2014-06-11 18:52:14 | tim.peters | set | recipients:
+ tim.peters, rhettinger, mark.dickinson, pacosta |
2014-06-11 18:52:14 | tim.peters | set | messageid: <1402512734.55.0.664268989317.issue21712@psf.upfronthosting.co.za> |
2014-06-11 18:52:14 | tim.peters | link | issue21712 messages |
2014-06-11 18:52:14 | tim.peters | create | |
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