review code.

tushare/stock.go

@@ -2,6 +2,8 @@ package tushare
 
 import (
 	"time"
+
+	"git.apinb.com/quant/qsdk/conv"
 )
 
 /*
@@ -49,7 +51,10 @@ func (cli *TushareClient) ReturnLastTradeDay() string {
 		return ""
 	}
 	cal := result.Map()
-	return cal[0]["cal_date"].(string)
+	if len(cal) == 0 {
+		return ""
+	}
+	return conv.AnyToString(cal[0]["cal_date"])
 }
 
 /*