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improve __mul__ in fraction: simplification inside mul

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Lafrite 2014-05-28 20:00:39 +02:00
parent 5f16cf7b62
commit 7568b42fcc
1 changed files with 21 additions and 4 deletions
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25
pymath/fraction.py
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@ -152,10 +152,27 @@ class Fraction(object):
steps = [] steps = []
steps.append([self._num, number._num, '*', self._denom, number._denom, '*', '/']) gcd1 = gcd(self._num, number._denom)
if gcd1 != 1:
num1 = [int(self._num/ gcd1), gcd1, "*"]
denom2 = [int(number._denom/ gcd1), gcd1, "*"]
else:
num1 = [self._num]
denom2 = [number._denom]
num = self._num * number._num gcd2 = gcd(self._denom, number._num)
denom = self._denom * number._denom if gcd2 != 1:
num2 = [int(number._num/ gcd2), gcd2, "*"]
denom1 = [int(self._denom/ gcd2), gcd2, "*"]
else:
num2 = [number._num]
denom1 = [self._denom]
steps.append(num1 + num2 + [ '*'] + denom1 + denom2 + ['*', '/'])
num = int(self._num * number._num / (gcd1 * gcd2))
denom = int(self._denom * number._denom / (gcd1 * gcd2))
ans_frac = Fraction(num, denom) ans_frac = Fraction(num, denom)
steps.append(ans_frac) steps.append(ans_frac)
@ -214,7 +231,7 @@ if __name__ == '__main__':
f = Fraction(1, 12) f = Fraction(1, 12)
g = Fraction(1, 12) g = Fraction(1, 12)
h = Fraction(1,-5) h = Fraction(1,-5)
t = Fraction(4,5) t = Fraction(10,3)
print("---------") print("---------")
print("1 + ", str(h)) print("1 + ", str(h))
for i in (1 + h): for i in (1 + h):