now working

backend/src/overpass/caching_strategy.py

@@ -59,7 +59,7 @@ class JSONCache(CachingStrategyBase):
                 with open(filename, 'r', encoding='utf-8') as file:
                     data = json.load(file)
                 return data  # Return the parsed JSON data
-            except json.JSONDecodeError as err:
+            except json.JSONDecodeError:
                 return None  # Return None if parsing fails
         return None
 
@@ -73,8 +73,8 @@ class JSONCache(CachingStrategyBase):
         except IOError as e:
             raise IOError(f"Error writing to cache file: {filename} - {e}") from e
 
-    def set_hollow(self, key, cell: tuple, osm_types: OSM_TYPES,
-                    selector: str, conditions=[], out='center'):
+    def set_hollow(self, key, cell: tuple, osm_types: list,
+                    selector: str, conditions: list=None, out='center'):
         """Create an empty placeholder cache entry for a future fill."""
         hollow_key = f'hollow_{key}'
         filename = self._filename(hollow_key)
@@ -85,7 +85,7 @@ class JSONCache(CachingStrategyBase):
             "cell": list(cell),
             "osm_types": list(osm_types),
             "selector": selector,
-            "conditions": conditions if conditions else "none",
+            "conditions": conditions,
             "out": out
         }
         # Write the hollow data to the cache file
@@ -130,11 +130,6 @@ class CachingStrategy:
 
     @classmethod
     def set_hollow(cls, key, cell: tuple, osm_types: OSM_TYPES,
-                    selector: str, conditions=[], out='center'):
+                    selector: str, conditions: list=None, out='center'):
         """Create a hollow cache entry."""
         cls.__strategy.set_hollow(key, cell, osm_types, selector, conditions, out)
-
-    @classmethod
-    def fill_hollow(cls, key, value):
-        """Fill in the hollow cache entry with actual data."""
-        cls.__strategy.fill_hollow(key, value)