Rework Python callback functions. (#6199)

* Define a new callback interface for Python. * Deprecate the old callbacks. * Enable early stopping on dask.
2020-10-10 17:52:36 +08:00
parent b5b24354b8
commit ab5b35134f
13 changed files with 1180 additions and 275 deletions
--- a/doc/python/index.rst
+++ b/doc/python/index.rst
@@ -11,4 +11,5 @@ Contents
 .. toctree::
  python_intro
  python_api
+  callbacks
  Python examples <https://github.com/dmlc/xgboost/tree/master/demo/guide-python>