Duplicate results when displaying Javascript output

[ssuleyma]

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Description

The idea is to create an interactive dropdown widget that lists available py files and creates a new code cell in Jupyter notebook with content rendered from py file. I am able to do that but when I click run 2 duplicate code cells are generated instead of one.

Reproduce

N/A

• ipywidgets version 7.6.5
• Operating System and version: MacOS Monterey Version 12.2
• Browser and version: Safari Version 15.3 / Firefox version 97

Troubleshoot Output

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Command Line Output

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Browser Output

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Installed Labextensions

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