update docstring

ricequant · May 23, 2020 · 90bf7ad · 90bf7ad
1 parent e9acda1
commit 90bf7ad
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/rqalpha/portfolio/position.py b/rqalpha/portfolio/position.py
@@ -135,6 +135,9 @@ def position_pnl(self):
     @property
     def pnl(self):
         # type: () -> float
+        """
+        返回该持仓的累积盈亏
+        """
         if self.quantity == 0:
             return 0
         return (self.last_price - self.avg_price) * self.quantity * self._direction_factor