def ignore(name, *names):
    """
    Function decorator used to ignore certain parameters of your function
    when it is converted to command. You can specify one or more parameters
    to ignore.

    Parameters
    ----------
    name : str
        Name of the parameter.
    names :
        Specify more parameters to ignore.
    """
    def decorator(func):
        all_names = set((name, ) + names)
        if hasattr(func, 'ignore'):
            func.ignore = func.ignore.union(all_names)
        else:
            func.ignore = all_names
        return func
    return decorator