This codebase is a supplement to the publication Numerical calculation of the Hopf index for three-dimensional magnetic textures. This package provides Python implementations of the calculation of the Hopf index of the magnetisation texture for finite-difference micromagnetic simulations. The four methods implemented are twopointstencil, fivepointstencil, solidangle, and solidanglefourier. The package assumes NumPy arrays of the shape (Nx, Ny, Nz, 3), where Nx, Ny, Nz are the number of cells in the x-, y-, and z-directions respectively, and the final dimension is for the three components. It is assumed that the vector field is normalised. Please see the repository for further information.