from fractions import Fraction
x = Fraction(0,1)
numerators = [1,2,3,4,5]
denominators = [9,8,7,6,5]
for n,d in zip(numerators, denominators):
x = Fraction(x.numerator+n,x.denominator+d)
print x
print x
print Fraction(sum(numerators),1+sum(denominators))
ZnJvbSBmcmFjdGlvbnMgaW1wb3J0IEZyYWN0aW9uCgp4ID0gRnJhY3Rpb24oMCwxKQpudW1lcmF0b3JzID0gWzEsMiwzLDQsNV0KZGVub21pbmF0b3JzID0gWzksOCw3LDYsNV0KZm9yIG4sZCBpbiB6aXAobnVtZXJhdG9ycywgZGVub21pbmF0b3JzKToKICAgIHggPSBGcmFjdGlvbih4Lm51bWVyYXRvcituLHguZGVub21pbmF0b3IrZCkKICAgIHByaW50IHgKcHJpbnQgeAoKcHJpbnQgRnJhY3Rpb24oc3VtKG51bWVyYXRvcnMpLDErc3VtKGRlbm9taW5hdG9ycykp