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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 server_power(status, host=None,
                  admin_username=None,
                  admin_password=None,
                  module=None):
    '''
    status
        One of 'powerup', 'powerdown', 'powercycle', 'hardreset',
        'graceshutdown'

    host
        The chassis host.

    admin_username
        The username used to access the chassis.

    admin_password
        The password used to access the chassis.

    module
        The element to reboot on the chassis such as a blade. If not provided,
        the chassis will be rebooted.

    CLI Example:

    .. code-block:: bash

        salt dell dracr.server_reboot
        salt dell dracr.server_reboot module=server-1

    '''
    return __execute_cmd('serveraction {0}'.format(status),
                         host=host, admin_username=admin_username,
                         admin_password=admin_password, module=module)