From c42ecb6ec87af14fba2e632ee5f757980e9b8056 Mon Sep 17 00:00:00 2001
From: "vn.py" <vn.py@foxmail.com>
Date: Sun, 10 Jun 2018 14:59:03 +0800
Subject: [PATCH] =?UTF-8?q?[Fix]=E4=BF=AE=E5=A4=8D=E5=B8=81=E5=AE=89API?=
 =?UTF-8?q?=E5=85=B3=E9=97=AD=E6=97=B6=E7=9A=84=E7=BA=BF=E7=A8=8B=E6=B1=A0?=
 =?UTF-8?q?=E5=85=B3=E9=97=AD=E9=97=AE=E9=A2=98?=
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---
 vnpy/api/binance/vnbinance.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/vnpy/api/binance/vnbinance.py b/vnpy/api/binance/vnbinance.py
index 8e9ade96..9d9decfd 100644
--- a/vnpy/api/binance/vnbinance.py
+++ b/vnpy/api/binance/vnbinance.py
@@ -85,8 +85,10 @@ class BinanceApi(object):
     def close(self):
         """"""
         self.active = False
-        self.pool.close()
-        self.pool.join()
+        
+        if self.pool:
+            self.pool.close()
+            self.pool.join()
     
     #----------------------------------------------------------------------
     def request(self, method, path, params=None, signed=False, stream=False):