changed WindowsError as it renamed as OSError #1

dist/client/dash_client.py

@@ -17,7 +17,7 @@
 import six
 
 import sys
-import sys
+
 
 if sys.version_info[0] < 3:
     # Python 2
@@ -57,10 +57,17 @@
 from configure_log_file import configure_log_file, write_json
 import time
 
-try:
-    WindowsError
-except NameError:
-    from shutil import WindowsError
+if sys.version_info[0] < 3:
+    # Python 2
+    import shutil
+else:
+    # Python 3
+    import shutil
+
+    try:
+        from shutil import WindowsError
+    except ImportError:
+        WindowsError = OSError
 
 
 # Constants