title: Jupyter ipywidget: use one slider widget in one specifc tab in notebook
body: <p>I am trying to create ipywidgets tab and I am looking for one particular numeric widget in a tab, currently, I am seeing both the tabs as common, how can I see size1 in tab[out2] specifically. My existing code looks like following</p>
  
  <pre><code>import ipywidgets as widgets
  from ipywidgets import HBox, VBox, Button, Layout, Label
  from ipywidgets import interact, interactive, fixed, interact_manual
  
  size = widgets.IntSlider(value=50, min=0,max=100,step=1, description='size:')
  size1 = widgets.IntSlider(value=20, min=0,max=50,step=1, description='size1:')
  
  def hist1(size):
      data = pd.DataFrame(np.random.normal(size = size))
      data.plot.hist()
      return
  
  def hist2(size1):
      data = pd.DataFrame(np.random.normal(size = size1))
      data.plot.box()
      return
  
  ui = widgets.VBox([size,size1])
  
  out1 = widgets.interactive_output(hist1, {'size':size})
  out2 = widgets.interactive_output(hist2, {'size1':size1})
  
  tab  = widgets.Tab(children = [out1, out2])
  tab.set_title(0, 'hist')
  tab.set_title(1, 'box')
  
  display(ui,tab)
  </code></pre>
  
  <p>it's giving me following</p>
  
  <p><a href="https://i.stack.imgur.com/JUy34.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JUy34.png" alt="enter image description here"></a></p>
  
  <p>but I am seeking to see size1 slider in out2 i.e. box tab, how can I do this with existing code to have a specific slider for tabs</p>