Raise edit API errors with response details

add_links/mediawiki_api.py

@@ -1,7 +1,6 @@
 """Interface with the mediawiki API."""
 
 import typing
-from pprint import pprint
 from typing import Any, cast
 
 import requests
@@ -12,6 +11,17 @@ from . import mediawiki_oauth
 class APIError(Exception):
     """Unexpected response from the MediaWiki API."""
 
+
+def _format_api_error(data: dict[str, Any]) -> str:
+    """Format a MediaWiki API error response."""
+    error = data.get("error")
+    if isinstance(error, dict):
+        message = error.get("info") or error.get("code")
+        if message:
+            return str(message)
+    return f"Unexpected MediaWiki API response: {data!r}"
+
+
 wiki_hostname = "en.wikipedia.org"
 wiki_api_php = f"https://{wiki_hostname}/w/api.php"
 user_agent = "add-links/0.1"
@@ -103,8 +113,5 @@ def edit_page(
     }
     ret = call(params, timeout=30)
     if "edit" not in ret:
-        print("params")
-        pprint(params)
-        print()
-        pprint(ret)
+        raise APIError(_format_api_error(ret))
     return typing.cast(str, ret["edit"])