Merge pull request #1836 from 1122455801/backtesting_mod_0615

[Mod] 回测引擎增加日期过滤

vnpy/app/cta_strategy/backtesting.py

@@ -214,6 +214,10 @@ class BacktestingEngine:
         if not self.end:
             self.end = datetime.now()
 
+        if self.start >= self.end:
+            self.output("起始日期必须小于结束日期")    
+            return        
+
         self.history_data.clear()       # Clear previously loaded history data
 
         # Load 30 days of data each time and allow for progress update