## Guan package

Guan is an open source python package, dealing with tight-binding models by calculating band structures, density of states, quantum transport, topological invariant, etc. Other trivial functions are also integrated, including file reading/writing, figure plotting, data processing. The official website is https://py.guanjihuan.com.

## Installation

pip install --upgrade guan

## Usage

import guan

## Summary of API Reference

+ basic functions
+ Fourier transform
+ Hamiltonian of finite size systems
+ Hamiltonian of models in the reciprocal space
+ band structures and wave functions
+ Green functions
+ density of states
+ quantum transport
+ topological invariant
+ read and write
+ plot figures
+ data processing
+ others