We'll start our dive into SymPy by looking at how to work with rational numbers. You can also use Rational(1/2) but sometimes unexpected things can happen due to Python converting the division to ...

For numbers with a decimal separator, by default Python uses float and Pandas uses numpy float64 ... b = 0.1 + 0.1 + 0.1 - 0.3 print(b) # 5.551115123125783e-17 Float is accurate enough for many uses.