SymPy has one important prerequisite library named mpmath. It is a Python library for real and complex floating-point arithmetic with arbitrary precision. However, Python”s package installer PIP installs it automatically when SymPy is installed as follows −

pip install sympy

Other Python distributions such as Anaconda, Enthought Canopy, etc., may have SymPy already bundled in it. To verify, you can type the following in the Python prompt −

>>> import sympy
>>> sympy.__version__

And you get the below output as the current version of sympy −

”1.5.1”

Source code of SymPy package is available at https://github.com/sympy/sympy.