title: Extracting Numenator and Denominator of Rational Data Type in Sympy
body: <p>I have declared rational data types in a list data like this:</p>
  <pre><code>from sympy import *
  lst = list()
  lst[0]=Rational(0,1)
  lst[1]=Rational(3,14)
  lst[2]=Rational(1,7)
  lst[3]=Rational(9,14)
  </code></pre>
  <p>How do i extract the numerator and denominator part i.e. lst[0].denominator ?</p>