title: The area of the intersection of two ovals (ellipses)?
body: <p>I need to calculate the amount of two oval intersects in a python program.
  I know in <a href="https://pypi.python.org/pypi/Shapely" rel="nofollow noreferrer">shaply</a> there is a function that return true if two object has intersects. As like as this:</p>
  <pre><code>from shapely.geometry import Polygon
  p1=Polygon([(0,0),(1,1),(1,0)])
  p2=Polygon([(0,1),(1,0),(1,1)])
  print p1.intersects(p2)
  </code></pre>
  <p>is there any library or function That help me?
  Thanks.</p>