diff --git a/examples/python/bincover.py b/examples/python/bincover.py
index d8a81c25a..72b769982 100644
--- a/examples/python/bincover.py
+++ b/examples/python/bincover.py
@@ -195,7 +195,7 @@ class BinCoverSolver(UserPropagateBase):
         assert isinstance(value, BitVecNumRef)
         bin_index = value.as_long()
         if bin_index >= len(self.bins):
-            return NOne
+            return None
         return self.bins[bin_index]
 
     def _add_item2bin(self, item, bin):
diff --git a/examples/python/complex/complex.py b/examples/python/complex/complex.py
index aa9adeef8..051641808 100644
--- a/examples/python/complex/complex.py
+++ b/examples/python/complex/complex.py
@@ -81,7 +81,7 @@ class ComplexExpr:
         other = _to_complex(other)
         return And(self.r == other.r, self.i == other.i)
 
-    def __neq__(self, other):
+    def __ne__(self, other):
         return Not(self.__eq__(other))
 
     def simplify(self):