xESMF is a Python package for regridding. It is

• Powerful: It uses ESMF/ESMPy as backend and can regrid between general curvilinear grids with all ESMF regridding algorithms, such as bilinear, conservative and nearest neighbour.
• Easy-to-use: It abstracts away ESMF's complicated infrastructure and provides a simple, high-level API, compatible with xarray as well as basic numpy arrays.
• Fast: It is faster than ESMPy's original Fortran regridding engine in serial case, and also supports dask for out-of-core, parallel computation.

Please see online documentation, or play with example notebooks on Binder.

For new users, I also recommend reading How to ask for help and How to support xESMF.