Fix: make remapper config object optional (#36)

* fix: make config object optional

* chore: add .envrc to gitignore

* docs: changelog

.gitignore

@@ -121,6 +121,7 @@ celerybeat.pid
 
 # Environments
 .env
+.envrc
 .venv
 env/
 venv/

CHANGELOG.md

@@ -12,7 +12,7 @@ Keep it human-readable, your future self will thank you!
 
 ### Added
  - CI workflow to update the changelog on release
- - Remapper: Preprocessor for remapping one variable to multiple ones. Includes changes to the data indices since the remapper changes the number of variables.
+ - Remapper: Preprocessor for remapping one variable to multiple ones. Includes changes to the data indices since the remapper changes the number of variables. With optional config keywords.
 
 ### Changed
 

src/anemoi/models/data_indices/collection.py

@@ -30,9 +30,11 @@ def __init__(self, config, name_to_index) -> None:
         self.diagnostic = (
             [] if config.data.diagnostic is None else OmegaConf.to_container(config.data.diagnostic, resolve=True)
         )
-        # config.data.remapped is a list of diccionaries: every remapper is one entry of the list
+        # config.data.remapped is an optional dictionary with every remapper as one entry
         self.remapped = (
-            dict() if config.data.remapped is None else OmegaConf.to_container(config.data.remapped, resolve=True)
+            dict()
+            if config.data.get("remapped") is None
+            else OmegaConf.to_container(config.data.remapped, resolve=True)
         )
         self.forcing_remapped = self.forcing.copy()