diff --git a/python-temel/overload.error.py b/python-temel/overload.error.py
new file mode 100644
index 0000000..6f28d79
--- /dev/null
+++ b/python-temel/overload.error.py
@@ -0,0 +1,10 @@
+class Sample:
+    def foo(self):
+        print('parametresiz foo')
+
+    def foo(self, a):
+        print('parametreli foo')
+
+s = Sample()
+s.foo(10)                 # geçerli
+# s.foo()                 # error!
diff --git a/python-temel/overload.error.py~ b/python-temel/overload.error.py~
new file mode 100644
index 0000000..2dd083c
--- /dev/null
+++ b/python-temel/overload.error.py~
@@ -0,0 +1,10 @@
+class Sample:
+    def foo(self):
+        print('parametresiz foo')
+
+    def foo(self, a):
+        print('parametreli foo')
+
+s = Sample()
+s.foo(10)               # geçerli
+s.foo()                 # error!