change file save path

courses/Attachment.py

@@ -0,0 +1,10 @@
+class Attachment:
+    def __init__(self, attachment_id, course_id, name, content, url):
+        self.id = attachment_id
+        self.course_id = course_id
+        self.name = name
+        self.content = content
+        self.url = url
+
+    def __repr__(self):
+        return f"Attachment(id={self.id}, course_id={self.course_id}, name={self.name}, url={self.url})"