1 files changed, 17 insertions, 3 deletions
diff --git a/rdflib/plugins/sparql/parserutils.py b/rdflib/plugins/sparql/parserutils.py
index 6748a7f0..a936b046 100644
--- a/rdflib/plugins/sparql/parserutils.py
+++ b/rdflib/plugins/sparql/parserutils.py
@@ -1,10 +1,14 @@
 from collections import OrderedDict
 from types import MethodType
+from typing import TYPE_CHECKING, Any
 
 from pyparsing import ParseResults, TokenConverter, originalTextFor
 
 from rdflib import BNode, Variable
 
+if TYPE_CHECKING:
+    from rdflib.plugins.sparql.sparql import FrozenBindings
+
 """
 
 NOTE: PyParsing setResultName/__call__ provides a very similar solution to this
@@ -38,7 +42,12 @@ the resulting CompValue
 # Comp('Sum')( Param('x')(Number) + '+' + Param('y')(Number) )
 
 
-def value(ctx, val, variables=False, errors=False):
+def value(
+    ctx: "FrozenBindings",
+    val: Any,
+    variables: bool = False,
+    errors: bool = False,
+):
     """
     utility function for evaluating something...
 
@@ -138,7 +147,7 @@ class CompValue(OrderedDict):
 
     """
 
-    def __init__(self, name, **values):
+    def __init__(self, name: str, **values):
         OrderedDict.__init__(self)
         self.name = name
         self.update(values)
@@ -164,7 +173,7 @@ class CompValue(OrderedDict):
     def get(self, a, variables=False, errors=False):
         return self._value(OrderedDict.get(self, a, a), variables, errors)
 
-    def __getattr__(self, a):
+    def __getattr__(self, a: str) -> Any:
         # Hack hack: OrderedDict relies on this
         if a in ("_OrderedDict__root", "_OrderedDict__end"):
             raise AttributeError()
@@ -174,6 +183,11 @@ class CompValue(OrderedDict):
             # raise AttributeError('no such attribute '+a)
             return None
 
+    if TYPE_CHECKING:
+        # this is here because properties are dynamically set on CompValue
+        def __setattr__(self, __name: str, __value: Any) -> None:
+            ...
+
 
 class Expr(CompValue):
     """