cara menguji perpustakaan Python pihak ke -3 di berbagai lingkungan
# Check if the project has tox.ini file defined
# install tox library in your environment, virutal env or notebook
pip install tox
# traverse to that project directory where tox.ini is located
# start tox app
tox
# it'll start with output of unit testing result in all python environment
# that project supports
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