pip install echelle
or download the git repository and
python setup.py install
For a dynamic interface:
from echelle import interact_echelle
interact_echelle(frequency, power, dnu_min, dnu_max)
If you're using in a Jupyter notebook, I suggest:
interact_echelle(frequency, power, dnu_min, dnu_max, notebook=True)
To plot a non-interactive echelle diagram,
from echelle import plot_echelle
plot_echelle(frequency, power, dnu)