Implemented SheerkaOntology

src/cache/IncCache.py

@@ -1,4 +1,5 @@
 from cache.Cache import Cache
+from core.global_symbols import NotFound, Removed
 
 
 class IncCache(Cache):
@@ -6,13 +7,18 @@ class IncCache(Cache):
     Increment the value of the key every time it's accessed
     """
 
-    def _get(self, key):
-        value = super()._get(key) or 0
+    def _get(self, key, alt_sdp=None):
+        value = super()._get(key, alt_sdp=alt_sdp)
+        if value in (NotFound, Removed):
+            value = 0
         value += 1
-        self._put(key, value)
+        self._put(key, value, alt_sdp)
         return value
 
-    def _put(self, key, value):
+    def _put(self, key, value, alt_sdp):
         self._cache[key] = value
         self._add_to_add(key)
         return True
+
+    def _alt_get(self, key):
+        return super()._get(key)  # point to parent, not to self