checkpoint manager

core/data_provider.py

@@ -1467,12 +1467,10 @@ class DataProvider:
             # Update COB data cache for distribution
             binance_symbol = symbol.replace('/', '').upper()
             if binance_symbol not in self.cob_data_cache or self.cob_data_cache[binance_symbol] is None:
-                from collections import deque
                 self.cob_data_cache[binance_symbol] = deque(maxlen=300)
             
             # Ensure the deque is properly initialized
             if not isinstance(self.cob_data_cache[binance_symbol], deque):
-                from collections import deque
                 self.cob_data_cache[binance_symbol] = deque(maxlen=300)
             
             self.cob_data_cache[binance_symbol].append({