Inject datatable’s stylesheets into the Jupyter notebook. This function does nothing when it runs in a normal Python environment outside of Jupyter.

When datatable runs in a Jupyter notebook, it renders its Frames as HTML tables. The appearance of these tables is enhanced using a custom stylesheet, which must be injected into the notebook at any point on the page. This is exactly what this function does.

Normally, this function is called automatically when datatable is imported. However, in some circumstances Jupyter erases these stylesheets (for example, if you run import datatable cell twice). In such cases, you may need to call this method manually.