with example 2

python-temel/test.txt

@@ -0,0 +1 @@
+this is a test

python-temel/with.deyimi.2.py

@@ -0,0 +1,25 @@
+class FileWrapper:
+    def __init__(self, path):
+        self.f = open(path, 'w')
+
+    def write(self, s):
+        self.f.write(s)
+
+    def close(self):
+        self.f.close()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.f.close()
+        return False
+
+try:
+    with FileWrapper('test.txt') as f:
+        f.write('this is a test')
+    #....
+except:
+    print('file io error!')
+
+# Bu noktada dosya kapatılmış olacak