Reverse Polish Notation Calculator

Run without installing

# One shot calculation
python rpn.py 3 4 +

# Pipeline
cat foobar.txt | python rpn.py

# Interactive mode
python rpn.py

To install

sudo make install

It will create a rpn symbolic link to rpn.py that you can run anywhere.

To uninstall

sudo make uninstall

To run tests

make test

Requires pytest installed.

Considerations

• It was tested on a Linux system with Python 3.8.2, but should run on any Unix system with python 3.5+.
• I deliberately choosed to not use some external modules (Click, Argparse, etc).
• I aimed to be as simple as possible: flat files organization, no complex classes, etc. Basically pragmatism over purism.