When I am running iplot with pandas dataframe it has given me a big blank output in google colab. How Can I Solve the issue?

Question

#importing necessary library for plotly
import plotly as py
import plotly.tools as tls
import cufflinks as cf
py.offline.init_notebook_mode(connected=True)
import pandas as pd
import numpy as np
from plotly import __version__
import cufflinks as cf
from plotly.offline import download_plotlyjs,init_notebook_mode,plot,iplot
init_notebook_mode(connected=True)
cf.go_offline()
import chart_studio.plotly as py
import plotly.graph_objs as go

#reading the data which is iris dataset

df1=pd.read_csv("https://gist.githubusercontent.com/curran/a08a1080b88344b0c8a7/raw/0e7a9b0a5d22642a06d3d5b9bcbad9890c8ee534/iris.csv")

#using iplot to show the interactive plot

df1.iplot()

#Above code has given big blank output