fix compatibility with python < 3.9

Author: chocomega

README.md

@@ -5,7 +5,7 @@ This Python script retrieves statistics from [MyElectricalData](https://github.c
 Long Term Statistics will be created in Home Assistant and usable in the Energy Dashboard.
 
 ## Pre-requisites
-- Python 3.4 or higher
+- Python 3.5 or higher
 - A running instance of Home Assistant 2022.10.0 or higher
 - A running instance of MyElectricalData 0.8.13-11 or higher
 - MyElectricalData must be configured with the cache and hourly details enabled, cf. [wiki](https://github.com/m4dm4rtig4n/myelectricaldata/wiki/03.-Configuration)

statistics_importer.py

@@ -1,4 +1,4 @@
-__version__ = '2.0.0'
+__version__ = '2.0.1'
 
 import aiohttp
 import argparse
@@ -13,7 +13,7 @@
 import sys
 import time
 import traceback
-from typing import Any, Dict, Optional
+from typing import Any, Dict, List, Optional
 import yaml
 
 MED_CONFIG_DATE_FORMAT: str = "%Y-%m-%d"
@@ -132,7 +132,7 @@ def to_float(s: str) -> float:
         return math.nan
 
 
-def get_max_date_from_med_config(usage_point_config: dict[str, str], statistics_key: str) -> datetime:
+def get_max_date_from_med_config(usage_point_config: Dict[str, str], statistics_key: str) -> datetime:
     try:
         max_date_str = usage_point_config[f"{statistics_key}_max_date"]
         max_date = datetime.strptime(max_date_str, MED_CONFIG_DATE_FORMAT)
@@ -143,7 +143,7 @@ def get_max_date_from_med_config(usage_point_config: dict[str, str], statistics_
     return max_date
 
 
-def create_plan_from_med_config(usage_point_config: dict[str, str]):
+def create_plan_from_med_config(usage_point_config: Dict[str, str]):
     plan_type = PlanType(usage_point_config["plan"])
     if plan_type == PlanType.BASE:
         plan = PlanBase(to_float(usage_point_config["consumption_price_base"]),
@@ -157,7 +157,7 @@ def create_plan_from_med_config(usage_point_config: dict[str, str]):
     return plan
 
 
-def export_statistics_from_db(db_cursor: sqlite3.Cursor, stat_metadata: StatisticMetadata, start_date: datetime, sum_offset: float, plan: Plan) -> list[StatisticData]:
+def export_statistics_from_db(db_cursor: sqlite3.Cursor, stat_metadata: StatisticMetadata, start_date: datetime, sum_offset: float, plan: Plan) -> List[StatisticData]:
     is_cost = (stat_metadata.unit_of_measurement == Unit.EURO)
     is_base_tariff = (stat_metadata.tariff_type == TariffType.BASE)
     # Select the sum of the value column aggregated by hour
@@ -222,7 +222,7 @@ async def authenticate(self, access_token: str) -> None:
             raise Exception(
                 f"authenticate: auth NOT ok, check Home Assistant Long-Lived Access Token")
 
-    async def recorder_import_statistics(self, stat_metadata: StatisticMetadata, stats: list[StatisticData]) -> None:
+    async def recorder_import_statistics(self, stat_metadata: StatisticMetadata, stats: List[StatisticData]) -> None:
         self._command_id += 1
         await self._websocket.send_json({
             "id": self._command_id,
@@ -243,7 +243,7 @@ async def recorder_import_statistics(self, stat_metadata: StatisticMetadata, sta
         if not response["success"]:
             raise Exception(f"recorder_import_statistics: failed")
 
-    async def recorder_list_statistic_ids(self) -> list[dict]:
+    async def recorder_list_statistic_ids(self) -> List[dict]:
         self._command_id += 1
         response = await self._websocket.send_json({
             "id":  self._command_id,
@@ -259,7 +259,7 @@ async def recorder_list_statistic_ids(self) -> list[dict]:
 
         return response["result"]
 
-    async def recorder_clear_statistics(self, statistic_ids: list[str]) -> None:
+    async def recorder_clear_statistics(self, statistic_ids: List[str]) -> None:
         self._command_id += 1
         response = await self._websocket.send_json({
             "id":  self._command_id,
@@ -272,7 +272,7 @@ async def recorder_clear_statistics(self, statistic_ids: list[str]) -> None:
         if not response["success"]:
             raise Exception(f"recorder_clear_statistics: failed")
 
-    async def recorder_statistics_during_period(self, stat_metadata: StatisticMetadata, start_time: datetime, end_time: datetime) -> dict[str, list[StatisticData]]:
+    async def recorder_statistics_during_period(self, stat_metadata: StatisticMetadata, start_time: datetime, end_time: datetime) -> Dict[str, List[StatisticData]]:
         self._command_id += 1
         await self._websocket.send_json({
             "id":  self._command_id,