diff --git a/python-temel/foo.py b/python-temel/foo.py
new file mode 100644
index 0000000..de0a654
--- /dev/null
+++ b/python-temel/foo.py
@@ -0,0 +1,7 @@
+def foo(a):
+    print(a)                      # 10
+    a = 100
+
+x = 10
+foo(x)
+print(x)                          # 10