Add new providers in session

[darribas]

Develop a method within a Bunch that can append new TileProvider instances to a loaded set of providers. It should work something like:

import xyzservices.providers as xyz

xyz.add_provider({'url': 'http://myservice/{x}/{y}/{z}'})

[jorisvandenbossche]

What would be the goal of this?

If someone wants to define and use a custom TileProvider, they can also do MyProvider = TileProvider(url=..., ...) and then use MyProvider instead of xyz.MyProvider

[martinfleis]

We want to have a method that expands the existing Bunch from a custom JSON (#14). But if you don't have a JSON you may want to expand it in a different way and keep all providers within a single Bunch instead of having each as an object. It is not aimed so much at the addition of a single TileProvider but more of them. And we may use this under the hood in #14 so no reason not to expose it.

[jorisvandenbossche]

But also for #14, can you explain why you want to add it to the existing bunch of the package instead of creating a new bunch?

[martinfleis]

Let's assume that ipyleaflet, geopandas_view or any other package adds an interactive list of available basemaps, similar to what folium has (http://leaflet-extras.github.io/leaflet-providers/preview/), you want to ingest a single bunch from xyzservices. If you also want to add some custom basemaps (like custom CartoDB tiles) you want to append them to the existing bunch.