feat: 新增技能扩展N9一章相关示例源码

code/newsletter/N9/pw_models.py

@@ -0,0 +1,20 @@
+import pathlib
+
+import peewee as pw
+
+db_url = pathlib.Path(__file__).parent.joinpath("./mydb.sqlite3")
+db = pw.SqliteDatabase(db_url)
+
+
+class BaseModel(pw.Model):
+    class Meta:
+        database = db
+
+
+class User(BaseModel):
+    uid = pw.AutoField()
+    username = pw.CharField(max_length=10)
+
+
+if __name__ == '__main__':
+    db.create_tables([User])