To install py311-sphinxcontrib-htmlhelp, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install py311-sphinxcontrib-htmlhelp
To see what files were installed by py311-sphinxcontrib-htmlhelp, run:
port contents py311-sphinxcontrib-htmlhelp
To later upgrade py311-sphinxcontrib-htmlhelp, run:
sudo port selfupdate && sudo port upgrade py311-sphinxcontrib-htmlhelp
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