Separate a fraction

[Gaurav Sathe]

If 'f' is a fraction, can someone please tell me how to separate the numerator and denominator of f????  I tried f.numerator and f.denominator but it doesnt seem to work...

[Sean Vig]

This is documented in the online docs [1] and in the docstring. If you're using ipython, you can use their introspection to check the docstring, for example, as '?Rational'. From the docstring:

**Low-level**

Access numerator and denominator as .p and .q:

>>> r = Rational(3,4)

>>> r

3/4

>>> r.p

3

>>> r.q

4

[1] http://docs.sympy.org/0.7.1/index.html

Sean

On Wed, Feb 29, 2012 at 00:48, Gaurav Sathe <gaurav....@gmail.com> wrote:

If 'f' is a fraction, can someone please tell me how to separate the numerator and denominator of f????  I tried f.numerator and f.denominator but it doesnt seem to work...

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[Aaron Meurer]

A better way is to use .as_numer_denom(), which also works on symbolic
fractions:

In [380]: Rational(3, 4).as_numer_denom()
(3, 4)

In [381]: (x/y).as_numer_denom()
(x, y)

There's also the fraction() function, which does almost the same thing:

In [382]: fraction(Rational(3, 4))
(3, 4)

In [383]: fraction(x/y)
(x, y)

Aaron Meurer

[Chris Smith]

also...

>>> numer(a/y)

a

>>> denom(a/y)

y

fraction, numer and denom don't re-write the expression as a fraction:

>>> numer(a/y+x)

a/y + x

[Gaurav Sathe]

Yep that works... Thnx a lot Sean, Aaron and Chris

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Gaurav Sathe
-Student at BITS Pilani - Goa Campus