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import rosgraph

if rosgraph.is_master_online():

 print 'ROS MASTER is Online'

else:

 print 'ROS MASTER is Offline'

~~import rosgraph~~

if rosgraph.is_master_online():An example in Python:

import rosgraph


if rosgraph.is_master_online():    
     print 'ROS MASTER is Online'

else:

else:
     print 'ROS MASTER is Offline'

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