# Development guide

## first Development
```
1. init virtual env

python3 -m venv env

2. install dependence package

# switch to python venv
source env/bin/activate 
# install package
pip install -r requirements.txt

3. start development

```

## Development
```
# switch to python venv
source env/bin/activate 

start development
```
## Install external package
```
source env/bin/activate 

pip install {some pakage}

pip freeze >requirements.txt

```