Add classes for calibrating average ensemble and ensemble of tragedies

CHANGELOG.md

@@ -285,6 +285,7 @@ Removed:
 
 ### Added
 
+- `climada.util.calibrate` module for calibrating impact functions [#692](https://github.com/CLIMADA-project/climada_python/pull/692)
 - Convenience method `api_client.Client.get_dataset_file`, combining `get_dataset_info` and `download_dataset`, returning a single file objet. [#821](https://github.com/CLIMADA-project/climada_python/pull/821)
 - Read and Write methods to and from csv files for the `DiscRates` class. [#818](ttps://github.com/CLIMADA-project/climada_python/pull/818)
 - Add `CalcDeltaClimate` to unsequa module to allow uncertainty and sensitivity analysis of impact change calculations [#844](https://github.com/CLIMADA-project/climada_python/pull/844)

climada/util/calibrate/__init__.py

@@ -26,4 +26,9 @@
     BayesianOptimizerOutputEvaluator,
     select_best,
 )
+from .ensemble import (
+    AverageEnsembleOptimizer,
+    EnsembleOptimizerOutput,
+    TragedyEnsembleOptimizer,
+)
 from .scipy_optimizer import ScipyMinimizeOptimizer