gh-143504: Expose CELL status of a symbol in symtable

Lib/symtable.py

@@ -184,6 +184,7 @@ class Function(SymbolTable):
     __frees = None
     __globals = None
     __nonlocals = None
+    __cells = None
 
     def __idents_matching(self, test_func):
         return tuple(ident for ident in self.get_identifiers()
@@ -229,6 +230,13 @@ def get_frees(self):
             self.__frees = self.__idents_matching(is_free)
         return self.__frees
 
+    def get_cells(self):
+        """Return a list of cell variable names in the table.
+        """
+        if self.__cells is None:
+            self.__cells = [s.get_name() for s in self.get_symbols() if s.is_cell()]
+        return self.__cells
+
 
 class Class(SymbolTable):
 
@@ -342,6 +350,10 @@ def is_free(self):
         """
         return bool(self.__scope == FREE)
 
+    def is_cell(self):
+        """Return *True* if the symbol is a cell variable."""
+        return bool(self.__scope == CELL)
+
     def is_free_class(self):
         """Return *True* if a class-scoped symbol is free from
         the perspective of a method."""

Lib/test/test_symtable.py

@@ -284,6 +284,10 @@ def test_local(self):
     def test_free(self):
         self.assertTrue(self.internal.lookup("x").is_free())
 
+    def test_cells(self):
+        self.assertTrue(self.spam.lookup("x").is_cell())
+
+
     def test_referenced(self):
         self.assertTrue(self.internal.lookup("x").is_referenced())
         self.assertTrue(self.spam.lookup("internal").is_referenced())

Misc/NEWS.d/next/Core_and_Builtins/2026-01-08-16-28-03.gh-issue-143504.PlC_Yv.rst

@@ -0,0 +1 @@
+Add symtable.is_cell() and get_cells() methods for cell variable analysis.