Fix some type problems

freqtrade/exchange/binance.py

@@ -57,7 +57,7 @@ class Binance(Exchange):
             (side == "buy" and stop_loss < float(order['info']['stopPrice']))
         )
 
-    def get_tickers(self, symbols: List[str] = None, cached: bool = False) -> Dict:
+    def get_tickers(self, symbols: Optional[List[str]] = None, cached: bool = False) -> Dict:
         tickers = super().get_tickers(symbols=symbols, cached=cached)
         if self.trading_mode == TradingMode.FUTURES:
             # Binance's future result has no bid/ask values.
@@ -95,7 +95,7 @@ class Binance(Exchange):
     async def _async_get_historic_ohlcv(self, pair: str, timeframe: str,
                                         since_ms: int, candle_type: CandleType,
                                         is_new_pair: bool = False, raise_: bool = False,
-                                        until_ms: int = None
+                                        until_ms: Optional[int] = None
                                         ) -> Tuple[str, str, str, List]:
         """
         Overwrite to introduce "fast new pair" functionality by detecting the pair's listing date

freqtrade/exchange/exchange.py

@@ -1351,7 +1351,7 @@ class Exchange:
             raise OperationalException(e) from e
 
     @retrier
-    def fetch_bids_asks(self, symbols: List[str] = None, cached: bool = False) -> Dict:
+    def fetch_bids_asks(self, symbols: Optional[List[str]] = None, cached: bool = False) -> Dict:
         """
         :param cached: Allow cached result
         :return: fetch_tickers result
@@ -1379,7 +1379,7 @@ class Exchange:
             raise OperationalException(e) from e
 
     @retrier
-    def get_tickers(self, symbols: List[str] = None, cached: bool = False) -> Dict:
+    def get_tickers(self, symbols: Optional[List[str]] = None, cached: bool = False) -> Dict:
         """
         :param cached: Allow cached result
         :return: fetch_tickers result

freqtrade/exchange/kraken.py

@@ -45,7 +45,7 @@ class Kraken(Exchange):
         return (parent_check and
                 market.get('darkpool', False) is False)
 
-    def get_tickers(self, symbols: List[str] = None, cached: bool = False) -> Dict:
+    def get_tickers(self, symbols: Optional[List[str]] = None, cached: bool = False) -> Dict:
         # Only fetch tickers for current stake currency
         # Otherwise the request for kraken becomes too large.
         symbols = list(self.get_markets(quote_currencies=[self._config['stake_currency']]))

freqtrade/persistence/trade_model.py

@@ -868,8 +868,8 @@ class LocalTrade():
                 return o
         return None
 
-    def select_order(
-            self, order_side: str = None, is_open: Optional[bool] = None) -> Optional[Order]:
+    def select_order(self, order_side: Optional[str] = None,
+                     is_open: Optional[bool] = None) -> Optional[Order]:
         """
         Finds latest order for this orderside and status
         :param order_side: ft_order_side of the order (either 'buy', 'sell' or 'stoploss')

pyproject.toml

@@ -42,3 +42,11 @@ ignore_errors = true
 [build-system]
 requires = ["setuptools >= 46.4.0", "wheel"]
 build-backend = "setuptools.build_meta"
+
+[tool.pyright]
+include = ["freqtrade"]
+exclude = [
+  "**/__pycache__",
+  "build_helpers/*.py",
+]
+ignore = ["freqtrade/vendor/**"]