lc_boto.py

from boto.ec2.autoscale import AutoScaleConnection
from boto.ec2.autoscale import LaunchConfiguration

conn_as = AutoScaleConnection(AWS_ACCESS_KEY, AWS_SECRET_KEY)

#For a complete list of options see http://boto.cloudhackers.com/ref/ec2.html#boto.ec2.autoscale.launchconfig.LaunchConfiguration
lc = LaunchConfiguration(name='my-launch-config-name', image_id='ami-123456',
                             key_name='webserver-access-key',
                             security_groups=['webserver-security-group'],
                             instance_type='t1.micro',
                             instance_monitoring=True)
conn_as.create_launch_configuration(lc)