feat: 新增技能扩展N9一章相关示例源码

code/newsletter/N9/pw_connect.py

@@ -0,0 +1,21 @@
+import pathlib
+
+import peewee as pw
+
+db_url = pathlib.Path(__file__).parent.joinpath("./mydb.sqlite3")
+db = pw.SqliteDatabase(db_url)
+
+
+# # equivalent to this:
+# db_url = pathlib.Path(__file__).parent.joinpath("./mydb.sqlite3")
+# db = pw.SqliteDatabase(None)
+# db.init(db_url)
+
+
+db.connect()
+
+stmt = db.execute_sql("SELECT 1 as foo;").fetchall()
+print(stmt)
+
+
+db.close()