Removed None in dict.get()

https://stackoverflow.com/a/12631641

Extra Changes: freqtrade\freqtradebot.py:70
freqtrade\plugins\pairlistmanager.py:31

freqtrade/exchange/exchange.py

@@ -383,11 +383,11 @@ class Exchange:
         Ensures that Configured mode aligns to
         """
         return (
-            market.get('quote', None) is not None
-            and market.get('base', None) is not None
+            market.get('quote') is not None
+            and market.get('base') is not None
             and (self.precisionMode != TICK_SIZE
                  # Too low precision will falsify calculations
-                 or market.get('precision', {}).get('price', None) > 1e-11)
+                 or market.get('precision', {}).get('price') > 1e-11)
             and ((self.trading_mode == TradingMode.SPOT and self.market_is_spot(market))
                  or (self.trading_mode == TradingMode.MARGIN and self.market_is_margin(market))
                  or (self.trading_mode == TradingMode.FUTURES and self.market_is_future(market)))
@@ -537,7 +537,7 @@ class Exchange:
                 # The internal info array is different for each particular market,
                 # its contents depend on the exchange.
                 # It can also be a string or similar ... so we need to verify that first.
-            elif (isinstance(self.markets[pair].get('info', None), dict)
+            elif (isinstance(self.markets[pair].get('info'), dict)
                   and self.markets[pair].get('info', {}).get('prohibitedIn', False)):
                 # Warn users about restricted pairs in whitelist.
                 # We cannot determine reliably if Users are affected.
@@ -1593,7 +1593,7 @@ class Exchange:
     def get_fee(self, symbol: str, type: str = '', side: str = '', amount: float = 1,
                 price: float = 1, taker_or_maker: str = 'maker') -> float:
         try:
-            if self._config['dry_run'] and self._config.get('fee', None) is not None:
+            if self._config['dry_run'] and self._config.get('fee') is not None:
                 return self._config['fee']
             # validate that markets are loaded before trying to get fee
             if self._api.markets is None or len(self._api.markets) == 0:
@@ -1654,7 +1654,7 @@ class Exchange:
 
                 fee_to_quote_rate = safe_value_fallback2(tick, tick, 'last', 'ask')
             except ExchangeError:
-                fee_to_quote_rate = self._config['exchange'].get('unknown_fee_rate', None)
+                fee_to_quote_rate = self._config['exchange'].get('unknown_fee_rate')
                 if not fee_to_quote_rate:
                     return None
             return round((self._contracts_to_amount(