Plotly Ipython - display(HTML) function is not displaying html file

I am creating images using plotly library and trying to display in HTML. I have format the images in HTML format. But display(HTML(report_html)) code is not displaying HTML page.

I am using python 3.5 and pycharm IDE. I am not using iPython notebook.

Source code:

 from IPython.display import display, HTML, Image
 import plotly.plotly as py
 from plotly.offline import init_notebook_mode
 init_notebook_mode()

 data = go.scatter(x=df['date'], y=i, name = long_name['value'])
 figures = [data]
 images = [base64.b64encode(py.image.get(figure, width=width,height=height)).decode('utf-8') for figure in figures]

  report_html = ''
  for image in images:
      _ = template
      _ = _.format(image=image, caption='', width=width, height=height)
      report_html += _

  display(HTML(report_html))

I am not getting any error. I am just getting following output

IPython.core.display.HTML object