diff --git a/python-temel/f.seek.py b/python-temel/f.seek.py
new file mode 100644
index 0000000..9da4d92
--- /dev/null
+++ b/python-temel/f.seek.py
@@ -0,0 +1,3 @@
+with open('test.txt', 'r+') as f:
+    f.seek(0, 2)
+    s = f.write('xxx')
diff --git a/python-temel/test.txt b/python-temel/test.txt
index f2417c9..568b135 100644
--- a/python-temel/test.txt
+++ b/python-temel/test.txt
@@ -1,2 +1,2 @@
-mert
-gör
+0123456789
+xxx
\ No newline at end of file