<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def reserve_ipblock(call=None, kwargs=None):
    '''
    Reserve the IP Block
    '''
    if call == 'action':
        raise SaltCloudSystemExit(
            'The reserve_ipblock function must be called with -f or '
            '--function.'
        )

    conn = get_conn()

    if kwargs is None:
        kwargs = {}

    ret = {}
    ret['ips'] = []

    if kwargs.get('location') is None:
        raise SaltCloudExecutionFailure('The "location" parameter is required')
    location = kwargs.get('location')

    size = 1
    if kwargs.get('size') is not None:
        size = kwargs.get('size')

    block = conn.reserve_ipblock(IPBlock(size=size, location=location))
    for item in block['properties']['ips']:
        ret['ips'].append(item)

    return ret