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Fix to avoid TypeError with encoder count value of 'None' #16

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Fix to avoid TypeError with encoder count value of 'None' #16

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3 changes: 2 additions & 1 deletion roboclaw_node/nodes/roboclaw_node.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
#!/usr/bin/env python
from math import pi, cos, sin
from numbers import Number

import diagnostic_msgs
import diagnostic_updater
Expand Down Expand Up @@ -228,7 +229,7 @@ def run(self):
rospy.logwarn("ReadEncM2 OSError: %d", e.errno)
rospy.logdebug(e)

if ('enc1' in vars()) and ('enc2' in vars()):
if (isinstance(enc1,Number) and isinstance(enc2,Number)):
rospy.logdebug(" Encoders %d %d" % (enc1, enc2))
self.encodm.update_publish(enc1, enc2)

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