feat: 初始化项目并提交一次代码

services/statistics.py

@@ -0,0 +1,48 @@
+import time
+
+import aiosqlite
+from database import get_conn
+
+
+async def get_ammeter_left_ele(limit=24):
+    async with get_conn() as conn:
+        conn.row_factory = aiosqlite.Row
+        cursor = await conn.execute(
+            """
+            SELECT created_at, left_ele
+            FROM ammeter_usage
+            ORDER BY created_at DESC
+            LIMIT ?
+        """,
+            (limit,),
+        )
+        rows = await cursor.fetchall()
+
+    rows.reverse()
+
+    times = [time.strftime("%H:%M", time.localtime(r[0] / 1000)) for r in rows]
+    values = [r[1] for r in rows]
+
+    return times, values
+
+
+async def get_water_left(limit=24):
+    async with get_conn() as conn:
+        conn.row_factory = aiosqlite.Row
+        cursor = await conn.execute(
+            """
+            SELECT created_at, left_water
+            FROM water_usage
+            ORDER BY created_at DESC
+            LIMIT ?
+        """,
+            (limit,),
+        )
+        rows = await cursor.fetchall()
+
+    rows.reverse()
+
+    times = [time.strftime("%H:%M", time.localtime(r[0] / 1000)) for r in rows]
+    values = [r[1] for r in rows]
+
+    return times, values