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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def create_policy(name, policy_name, policy_type, policy, region=None,
                  key=None, keyid=None, profile=None):
    '''
    Create an ELB policy.

    .. versionadded:: 2016.3.0

    CLI example:

    .. code-block:: bash

        salt myminion boto_elb.create_policy myelb mypolicy LBCookieStickinessPolicyType '{"CookieExpirationPeriod": 3600}'
    '''
    conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)

    if not exists(name, region, key, keyid, profile):
        return False
    try:
        success = conn.create_lb_policy(name, policy_name, policy_type, policy)
        if success:
            log.info('Created policy %s on ELB %s', policy_name, name)
            return True
        else:
            log.error('Failed to create policy %s on ELB %s', policy_name, name)
            return False
    except boto.exception.BotoServerError as e:
        log.error('Failed to create policy %s on ELB %s: %s',
                  policy_name, name, e.message,
                  exc_info_on_loglevel=logging.DEBUG)
        return False