Hướng dẫn python fractions common denominator
Source code: Lib/fractions.py The A Fraction instance can be constructed from a pair of integers, from another rational number, or from a string. classfractions. Fraction (numerator=0, denominator=1)¶ class
fractions. Fraction (other_fraction) class fractions. Fraction (float) class fractions. Fraction (decimal) class fractions. Fraction (string)The first version requires that numerator and denominator are
instances of [sign] numerator ['/' denominator] where the optional >>> from fractions import Fraction >>> Fraction(16, -10) Fraction(-8, 5) >>> Fraction(123) Fraction(123, 1) >>> Fraction() Fraction(0, 1) >>> Fraction('3/7') Fraction(3, 7) >>> Fraction(' -3/7 ') Fraction(-3, 7) >>> Fraction('1.414213 \t\n') Fraction(1414213, 1000000) >>> Fraction('-.125') Fraction(-1, 8) >>> Fraction('7e-6') Fraction(7, 1000000) >>> Fraction(2.25) Fraction(9, 4) >>> Fraction(1.1) Fraction(2476979795053773, 2251799813685248) >>> from decimal import Decimal >>> Fraction(Decimal('1.1')) Fraction(11, 10) The Changed in version 3.9: The
numerator ¶Numerator of the Fraction in lowest term. denominator ¶
Denominator of the Fraction in lowest term. as_integer_ratio ()¶Return a tuple of two integers, whose ratio is equal to the Fraction and with a positive denominator. New in version 3.8. classmethodfrom_float (flt)¶Alternative constructor which only accepts instances of Note From Python 3.2 onwards, you can also construct a from_decimal (dec)¶Alternative constructor which only accepts instances of
limit_denominator (max_denominator=1000000)¶Finds and returns the closest >>> from fractions import Fraction >>> Fraction('3.1415926535897932').limit_denominator(1000) Fraction(355, 113) or for recovering a rational number that’s represented as a float: >>> from math import pi, cos >>> Fraction(cos(pi/3)) Fraction(4503599627370497, 9007199254740992) >>> Fraction(cos(pi/3)).limit_denominator() Fraction(1, 2) >>> Fraction(1.1).limit_denominator() Fraction(11, 10) __floor__ ()¶Returns the greatest
>>> from math import floor >>> floor(Fraction(355, 113)) 3 __ceil__ ()¶Returns the least __round__ ()¶ __round__ (ndigits)The first version returns the nearest See also Modulenumbers The abstract base classes making up the numeric tower. |