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Python fractions Module

❮ Standard Library Modules

Example

Exact rational arithmetic:

from fractions import Fraction

a = Fraction(1, 3)
b = Fraction(1, 6)
c = a + b
print(c)
print(float(c))
Try it Yourself »

Definition and Usage

The fractions module implements rational numbers as Fraction instances.

Use it for exact arithmetic to avoid floating-point rounding errors.

Members

Member Description
FractionRational number class with numerator and denominator.
limit_denominator()Approximate a Fraction to a given maximum denominator.

❮ Standard Library Modules

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