solved issues catalyst-cooperative#3592 and catalyst-cooperative#3005

src/pudl/metadata/classes.py

@@ -9,7 +9,7 @@
 from collections.abc import Callable, Iterable
 from functools import cached_property, lru_cache
 from pathlib import Path
-from typing import Annotated, Any, Literal, Self, TypeVar
+from typing import Annotated, Any, Literal, Self, TypeVar, Optional
 
 import jinja2
 import numpy as np
@@ -897,11 +897,19 @@ class Contributor(PudlMeta):
         "work package leader",
     ] = "project member"
     organization: String | None = None
-    orcid: String | None = None
+    orcid: Optional[String]| None = None
+
+    def __repr__(self):
+        """ representation excluding None values."""
+        attrs = {k: v for k, v in self.__dict__.items() if v is not None}
+        attr_str = ", ".join(f"{k}={repr(v)}" for k, v in attrs.items())
+        return f"{self.__class__.__name__}({attr_str})"
 
     @staticmethod
     def dict_from_id(x: str) -> dict:
         """Construct dictionary from PUDL identifier."""
+        #data = copy.deepcopy(CONTRIBUTORS[x])
+
         return copy.deepcopy(CONTRIBUTORS[x])
 
     @classmethod

src/pudl/transform/params/ferc1.py

@@ -4649,8 +4649,8 @@
                     "row_seq": "row_seq",
                     "row_prvlg": "row_prvlg",
                     "report_prd": "report_prd",
-                    "beg_yr_bal": "ending_balance",
-                    "end_yr_bal": "starting_balance",
+                    "beg_yr_bal": "starting_balance",
+                    "end_yr_bal": "ending_balance",
                     "dr_acct_num": "account_detail",
                     "dr_amount": "decrease_in_other_regulatory_liabilities",
                     "credits": "increase_in_other_regulatory_liabilities",