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No Module named plotleyjs

Hi – had a script written by a guy who is no longer available. With new computer had to reinstall the Anaconda Navigator (1.9.12), Python 3 and Jupyter notebook (6.0.3), Opens and runs but baulks at the first hurdle, Unable to find (plotleyjs). Now I am a real dummie and would appreciate some advice.
No problem finding plotley on the internet but it comes in 16 flavors, so;
Question 1— which one should I use for a simple line graph?
Question 2— where do I put it so it can be found?
question 3— does the script require a specific path to do the finding?

ModuleNotFoundError Traceback (most recent call last)
in
3 import datetime
4
----> 5 import download_plotlyjs, init_notebook_mode, plot, iplot
6 import plotly.graph_objects as go

ModuleNotFoundError: No module named ‘download_plotlyjs’