import optparse

import pylons
from paste.deploy import appconfig

from YOURAPP.config.environment import load_environment


if __name__ == '__main__':
    option_parser = optparse.OptionParser()
    option_parser.add_option('--ini',
        help='INI file to use for pylons settings',
        type='str',
        default='development.ini')
    options, args = option_parser.parse_args()

    # Initialize the Pylons app
    conf = appconfig('config:' + options.ini, relative_to='.')
    load_environment(conf.global_conf, conf.local_conf)

    # Now code can be run, the SQLalchemy Session can be used, etc.
    ....