bug fix: lock, parallel processing bigquery

setup.py

@@ -8,7 +8,7 @@ def read(fname):
     return open(os.path.join(os.path.dirname(__file__), fname)).read() 
 args    = {
     "name":"data-transport",
-    "version":"1.3.8.1",
+    "version":"1.3.8.2",
     "author":"The Phi Technology LLC","author_email":"info@the-phi.com",
     "license":"MIT",
     "packages":["transport"]}

transport/sql.py

@@ -238,11 +238,11 @@ class BQWriter(BigQuery,Writer):
     def write(self,_info,**_args) :
         try:
             if self.parallel :
-                self.lock.acquire()
+                BQWriter.lock.acquire()
             self._write(_info,**_args)
         finally:
             if self.parallel:
-                self.lock.release()
+                BQWriter.lock.release()
     def _write(self,_info,**_args) :
         _df = None
         if type(_info) in [list,pd.DataFrame] :