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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 reload_exports():
    '''
    Trigger a reload of the exports file to apply changes

    CLI Example:

    .. code-block:: bash

        salt '*' nfs3.reload_exports
    '''
    ret = {}

    command = 'exportfs -r'

    output = __salt__['cmd.run_all'](command)
    ret['stdout'] = output['stdout']
    ret['stderr'] = output['stderr']
    # exportfs always returns 0, so retcode is useless
    # We will consider it an error if stderr is nonempty
    ret['result'] = output['stderr'] == ''

    return ret