PythTB is a Python library for constructing and analyzing tight-binding models, built for modern topological band theory applications. It provides a streamlined path from model specification to physical interpretation, making it useful for both learning electronic structure and conducting research-level studies. With only a few lines of code, you can define lattice models, build tight-binding Hamiltonians, and compute electronic properties.

PythTB provides tools for:

• Band structures and density of states
• Berry phases and Berry curvature
• Chern numbers, Wilson loops, and related invariants
• Quantum geometric tensors and local Chern markers
• Chern-Simons axion angle
• Maximally localized Wannier functions
• Wannier-based tight-binding models generated through Wannier90

• Documentation: https://pythtb.readthedocs.io/en/latest/
• Contributing: https://pythtb.readthedocs.io/en/latest/development.html
• Tutorials: https://pythtb.readthedocs.io/en/latest/tutorials.html
• Formalism: https://pythtb.readthedocs.io/en/latest/formalism.html
• Source: https://github.com/pythtb/pythtb
• Report Issues: https://github.com/pythtb/pythtb/issues