change file save path

courses/Course.py

@@ -0,0 +1,27 @@
+from courses.Attachment import Attachment
+
+
+class Course:
+    def __init__(self, course_id, title, attachments=None):
+        self.id = course_id
+        self.title = title
+        self.attachments = attachments if attachments else []
+
+    def add_attachment(self, attachment):
+        self.attachments.append(attachment)
+
+    def __repr__(self):
+        return f"Course(id={self.id}, title={self.title}, attachments={self.attachments})"
+
+
+# 使用示例
+# 创建附件实例
+attachment1 = Attachment(attachment_id=1, course_id=101, name='Lesson 1', url='http://example.com/lesson1.mp3')
+attachment2 = Attachment(attachment_id=2, course_id=101, name='Lesson 2', url='http://example.com/lesson2.mp3')
+
+# 创建课程实例，并添加附件
+course = Course(course_id=101, title='Introduction to Python')
+course.add_attachment(attachment1)
+course.add_attachment(attachment2)
+
+print(course)