[Python] Import error in plotly while using FigureWidget

I am trying to use run the following commands in Jupyter notebook :

import ipywidgets
import plotly.graph_objs as go
print(ipywidgets.__version__)

f = go.FigureWidget()
f


I am getting the following error

ImportError: Please install ipywidgets>=7.0.0 to use the FigureWidget class


My ipywidgets version is 7.5.1. How to resolve this issue ?

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