from ipywidgets import DropDownWidget, StaticInteract
from IPython.display import IFrame, display, clear_output
import sys

links = {'l1': 'http://en.m.wikipedia.org/wiki/Path_integral_formulation',
         'l2': 'http://en.m.wikipedia.org/wiki/Spherical_harmonic'}

def show_iframe(link):
  clear_output(wait=True)

  sys.stdout.flush()
  i = IFrame(link,width=800,height=300)
  display(i)

StaticInteract(show_iframe,link = DropDownWidget(links.values(), labels=links.keys()))

#!jist -p iframes_with_ipywidgets.ipynb