That was [gnebehay’s] thought when his university studies were too high level, so he decided to write an arithmetic expression parser in Python. It came out in about 100 lines of code.

Learn how this popular Python library accelerates math at scale, especially when paired with tools like Cython and Numba.

but the python datetime.time class doesn't seem to have defined arithmetic operators, nor does the datetime.timedelta. if there are methods for this, that's not obvious to me either: Code: ...

When typing input, enter will jump you down to the next line, whereas shift-enter gets python to evaluate the code-cell. You can also press the run button in the menu bar instead of shift- enter. A ...