### Install bidict

Source: https://bidict.readthedocs.io

Use pip to install the bidict package.

```bash
pip install bidict
```

--------------------------------

### Initialize and use bidict

Source: https://bidict.readthedocs.io

Create a bidict instance and perform lookups using the mapping and its inverse.

```python
>>> from bidict import bidict
>>> element_by_symbol = bidict({'H': 'hydrogen'})
>>> element_by_symbol['H']
'hydrogen'
>>> element_by_symbol.inverse['hydrogen']
'H'
```

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