in Spyder ModuleNotFoundError: No module named 'plotly'

Question

New to python. Not sure how to to add a module.

import plotly.express as px

Error:

ipdb> ModuleNotFoundError: No module named 'plotly'

What steps are need to have this module recognised?

Answer 1

What worked for me, both under Windows and under MacOSX, is using Anaconda for all Python apps. This post also advises to use Anaconda:
Python dependency hell: A compromise between virtualenv and global dependencies?

I also found this article to be useful:
https://github.com/spyder-ide/spyder/wiki/Working-with-packages-and-environments-in-spyder

These are the steps I took.

• Install Anaconda:
  https://docs.anaconda.com/anaconda/user-guide/getting-started/

• Under Windows, open the Anaconda cmd prompt from the Anaconda Navigator. Under MacOSX, just open the cmd prompt.

• In the cmd prompt, install plotly with this command:

    conda install plotly
  

  This installs plotly in the Anaconda environment.

• Launch Spyder from the Anaconda Navigator. Always launch Spyder from the Anaconda Navigator, to make sure you're running the copy of Spyder from the Anaconda environment.

• In a Python script, load plotly:

    import plotly as py
  

After that you should be good to go with plotly.