address review comments

Author: felixdivo

can/interfaces/pcan/pcan.py

@@ -15,7 +15,8 @@
 from .basic import *
 
 try:
-    import uptime # isn't this from a library?
+    # use the "uptime" library if available
+    import uptime
     import datetime
     boottimeEpoch = (uptime.boottime() - datetime.datetime.utcfromtimestamp(0)).total_seconds()
 except:

can/listener.py

@@ -146,7 +146,7 @@ def on_message_received(self, msg):
         """
         self.buffer.put_nowait(msg)
 
-    def get_message(self):
+    async def get_message(self):
         """
         Retrieve the latest message when awaited for::
         
@@ -155,7 +155,7 @@ def get_message(self):
         :rtype: can.Message
         :return: The CAN message.
         """
-        return self.buffer.get()
+        return await self.buffer.get()
 
     def __aiter__(self):
         return self