Merge branch 'json-pandas-series' into 'master'

Make pandas series objects serialisable

See merge request lscsoft/bilby!807

bilby/core/utils.py

@@ -1021,6 +1021,8 @@ class BilbyJsonEncoder(json.JSONEncoder):
             return {'__complex__': True, 'real': obj.real, 'imag': obj.imag}
         if isinstance(obj, pd.DataFrame):
             return {'__dataframe__': True, 'content': obj.to_dict(orient='list')}
+        if isinstance(obj, pd.Series):
+            return {'__series__': True, 'content': obj.to_dict()}
         if inspect.isfunction(obj):
             return {"__function__": True, "__module__": obj.__module__, "__name__": obj.__name__}
         if inspect.isclass(obj):
@@ -1098,6 +1100,8 @@ def decode_bilby_json(dct):
         return complex(dct["real"], dct["imag"])
     if dct.get("__dataframe__", False):
         return pd.DataFrame(dct['content'])
+    if dct.get("__series__", False):
+        return pd.Series(dct['content'])
     if dct.get("__function__", False) or dct.get("__class__", False):
         default = ".".join([dct["__module__"], dct["__name__"]])
         return getattr(import_module(dct["__module__"]), dct["__name__"], default)