From 9557534eaf3709d90ea2197e75b60998a24aa7f4 Mon Sep 17 00:00:00 2001
From: "vn.py" <xiaoyou.chen@foxmail.com>
Date: Thu, 9 May 2019 13:41:40 +0800
Subject: [PATCH] [Add] write log and return if no data feteched

---
 vnpy/gateway/bitmex/bitmex_gateway.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/vnpy/gateway/bitmex/bitmex_gateway.py b/vnpy/gateway/bitmex/bitmex_gateway.py
index cb815936..e8248f29 100644
--- a/vnpy/gateway/bitmex/bitmex_gateway.py
+++ b/vnpy/gateway/bitmex/bitmex_gateway.py
@@ -331,9 +331,13 @@ class BitmexRestApi(RestClient):
                 break
             else:
                 data = resp.json()
+                if not data:
+                    msg = f"获取历史数据为空，开始时间：{start_time}，数量：{count}"
+                    break
 
                 for d in data:
-                    dt = datetime.strptime(d["timestamp"], "%Y-%m-%dT%H:%M:%S.%fZ")
+                    dt = datetime.strptime(
+                        d["timestamp"], "%Y-%m-%dT%H:%M:%S.%fZ")
                     bar = BarData(
                         symbol=req.symbol,
                         exchange=req.exchange,
@@ -360,7 +364,7 @@ class BitmexRestApi(RestClient):
                 # Update start time
                 start_time = bar.datetime + TIMEDELTA_MAP[req.interval]
 
-        return history            
+        return history
 
     def on_send_order_failed(self, status_code: str, request: Request):
         """