What is the Fraction.from_float() method in Python?

Overview

The from_float method obtains an instance of the Fraction class where the numerator and the denominator are inferred for the given floating-point value.

We also create a Fraction object by explicitly specifying the numerator and the denominator. However, this object is not the same as the one created using the from_float method.

For example:

Fraction.from_float(0.2) != Fraction(2, 10)

Syntax

from_float(flt)

Parameters

  • flt: This is a floating-point value.

Return type

The return type is a Fraction object.

Code

import fractions
float_value = 0.2
fraction_object_1 = fractions.Fraction.from_float(float_value)
fraction_object_2 = fractions.Fraction(2, 10)
print("Fraction object using from_float method - %s" % (fraction_object_1))
print("Fraction object by specifying numerator and denominator - %s" % (fraction_object_2))

Explanation

  • Line 1: We import the fractions module.

  • Line 3: We define a floating-point called float_value.

  • Line 5: We create an instance of the Fraction class called fraction_object_1 using the from_float method.

  • Line 7: We create an instance of the Fraction class called fraction_object_2 by passing the numerator and denominator values as constructor arguments.

  • Lines 9-11: We print fraction_object_1 and fraction_object_2.

  • From the output, we can conclude Fraction.from_float(0.2) != Fraction(2, 10).

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