Tutorials

Learning examples for the Guan package, extracted from the blog post Guan软件包学习示例.

One example per file. Each file is a self-contained script that you can run directly, or copy the functions you need into your own project.

Installation

pip install --upgrade guan

import guan

Run the examples

python tutorials/daily_scenarios/01_ai_chat.py
python tutorials/physics_scenarios/03_band_structure.py

Directory

tutorials/
├── 00_test.py                                  # package self test
├── daily_scenarios/                            # 一、日常场景
│   ├── 01_ai_chat.py
│   ├── 02_timing_log.py
│   ├── 03_function_timer.py
│   ├── 04_try_except.py
│   ├── 05_dump_and_load_data.py
│   ├── 06_print_array.py
│   ├── 07_matrix_in_file.py
│   ├── 08_parallel_calculation.py
│   ├── 09_loop_calculation.py
│   ├── 10_is_hermitian.py
│   └── 11_split_parameters.py
└── physics_scenarios/                          # 二、物理场景
    ├── 01_pauli_matrices.py
    ├── 02_real_space_hamiltonian.py
    ├── 03_band_structure.py
    ├── 04_chern_number_and_wilson_loop.py
    ├── 05_density_of_states_with_green_function.py
    ├── 06_conductance_and_scattering_matrix.py
    └── 07_wavefunction_gauge.py

一、日常场景 / Daily scenarios

File	说明	Requirements
`00_test.py`	软件包自检 `guan.test()`	-
`01_ai_chat.py`	AI 对话：内置模型、OpenAI 兼容接口、LangChain、Ollama、llama.cpp、ModelScope	OpenAI 接口需要 API Key；Ollama / llama.cpp / ModelScope 需要本地模型
`02_timing_log.py`	带日期和时间的运行日志 `guan.logging_with_day_and_time`	-
`03_function_timer.py`	函数计时器：`@guan.timer_decorator` 与 `guan.timer`	-
`04_try_except.py`	try except 简写：`@guan.try_decorator` 与 `guan.try_except`	-
`05_dump_and_load_data.py`	变量写入文件并读回	numpy
`06_print_array.py`	打印数组	numpy
`07_matrix_in_file.py`	矩阵写入 Markdown / LaTeX 格式文件后查看	numpy
`08_parallel_calculation.py`	多进程并行计算	-
`09_loop_calculation.py`	循环参数计算（一、二、三个参数）与作图	numpy, matplotlib
`10_is_hermitian.py`	检查是否为厄米矩阵（相对误差 1e-5）	numpy
`11_split_parameters.py`	数组分割，为并行计算准备参数	numpy

二、物理场景 / Physics scenarios

File	说明	Requirements
`01_pauli_matrices.py`	泡利矩阵	numpy
`02_real_space_hamiltonian.py`	一维 / 二维方格 / 三维立方格的实空间哈密顿量	numpy
`03_band_structure.py`	能带图计算：一维链、方格带、石墨烯锯齿形带	numpy, matplotlib
`04_chern_number_and_wilson_loop.py`	陈数与 Wilson loop 计算	numpy
`05_density_of_states_with_green_function.py`	用格林函数计算态密度（方格与立方格，局域态密度）	numpy, matplotlib
`06_conductance_and_scattering_matrix.py`	电导与散射矩阵的计算	numpy, matplotlib
`07_wavefunction_gauge.py`	波函数规范（fixed gauge）的选取	numpy

说明 / Notes

Some examples need an API Key, a local Ollama/llama.cpp/ModelScope model, or a specific model path. Edit the paths in the scripts before running them.
04_try_except.py contains a deliberate bug_code call to demonstrate the exception handling.
Figures are saved to the current working directory when the plotting functions are used.

License / 许可

The source post is published under CC BY, by Ji-Huan Guan. Please cite the source when quoting: https://www.guanjihuan.com/archives/38367

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