Use absolute import everywhere
This prevents Python 2.7 from attempting to import system modules
like sys and ctypes from the 'serial' directory.
diff --git a/serial/urlhandler/protocol_spy.py b/serial/urlhandler/protocol_spy.py
index 3479010..92aaa2e 100644
--- a/serial/urlhandler/protocol_spy.py
+++ b/serial/urlhandler/protocol_spy.py
@@ -20,6 +20,8 @@
# redirect output to an other terminal window on Posix (Linux):
# python -m serial.tools.miniterm spy:///dev/ttyUSB0?dev=/dev/pts/14\&color
+from __future__ import absolute_import
+
import sys
import time