File: list_instances

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python-boto 1.9b-4
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#!/usr/bin/env python
import boto
ec2 = boto.connect_ec2()

print "%-20s %-30s %s" % ("ID", "Groups", "Hostname")
for r in ec2.get_all_instances():
    groups = [g.id for g in r.groups]
    for i in r.instances:
        print "%-20s %-30s %s" % (i.id, ','.join(groups), i.public_dns_name)