fix hash

sisyphus/hash.py

@@ -42,6 +42,7 @@ def short_hash(obj, length=12, chars="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef
 _BasicSeqTypes: Tuple[type, ...] = (list, tuple)
 _BasicSetTypes: Tuple[type, ...] = (set, frozenset)
 _BasicDictTypes: Tuple[type, ...] = (dict,)
+_BasicTypesCombined: Tuple[type, ...] = _BasicTypes + _BasicSeqTypes + _BasicSetTypes + _BasicDictTypes
 
 
 def get_object_state(obj):
@@ -56,8 +57,16 @@ def get_object_state(obj):
     # so we keep consistent to the behavior of sis_hash_helper.
     if obj is None:
         return None
-    if isinstance(obj, _BasicTypes + _BasicSeqTypes + _BasicSetTypes + _BasicDictTypes):
-        return obj
+    if isinstance(obj, _BasicTypesCombined):
+        for type_ in _BasicTypesCombined:
+            if isinstance(obj, type_):
+                if type(obj) is type_:
+                    return obj
+                else:
+                    # This is a derived type. E.g. consider a namedtuple or np.float.
+                    # We want to return the basic type, to break any potential recursion.
+                    return type(obj)
+        assert False, f"should not get here, obj {obj!r} type {type(obj)!r}"
     if isfunction(obj) or isclass(obj):
         return obj.__module__, obj.__qualname__
 
@@ -118,13 +127,17 @@ def sis_hash_helper(obj):
         byte_list.append(obj)
     elif obj is None:
         pass
-    elif isinstance(obj, _BasicTypes):
+    # Note: Using type(obj) in _Types instead of isinstance(obj, _Types)
+    # because of historical reasons (and we cannot change this now).
+    # For derived types (e.g. namedtuple, np.float), it is then handled by get_object_state.
+    # That's why the handling of get_object_state for those types is important.
+    elif type(obj) in _BasicTypes:
         byte_list.append(repr(obj).encode())
-    elif isinstance(obj, _BasicSeqTypes):
+    elif type(obj) in _BasicSeqTypes:
         byte_list += map(sis_hash_helper, obj)
-    elif isinstance(obj, _BasicSetTypes):
+    elif type(obj) in _BasicSetTypes:
         byte_list += sorted(map(sis_hash_helper, obj))
-    elif isinstance(obj, _BasicDictTypes):
+    elif type(obj) in _BasicDictTypes:
         # sort items to ensure they are always in the same order
         byte_list += sorted(map(sis_hash_helper, obj.items()))
     elif isfunction(obj):