How to use the pycel.lib.function_helpers.excel_helper function in pycel

def test_ref_wrap(value, result):
    def r_test(*args):
        return args

    name_space = locals()
    name_space['_R_'] = lambda a: 'R:{}'.format(a)
    name_space['_C_'] = lambda a: 'C:{}'.format(a)

    func = apply_meta(
        excel_helper(ref_params=1)(r_test), name_space=name_space)[0]
    assert func(*value) == result

@excel_helper(cse_params=0)
def isodd(value):
    # Excel reference: https://support.office.com/en-us/article/
    #   is-functions-0f2d7971-6019-40a0-a171-f2d869135665
    if isinstance(value, bool):
        return VALUE_ERROR
    value = coerce_to_number(value)
    if isinstance(value, str):
        return VALUE_ERROR
    return bool(math.floor(abs(value)) % 2)

@excel_helper(cse_params=0)
def lookup(lookup_value, lookup_array, result_range=None):
    """
    There are two ways to use LOOKUP: Vector form and Array form

    Vector form: lookup_array is list like (ie: n x 1)

    Array form: lookup_array is rectangular (ie: n x m)

        First row or column is the lookup vector.
        Last row or column is the result vector
        The longer dimension is the search dimension

    :param lookup_value: value to match (value or cell reference)
    :param lookup_array: range of cells being searched.
    :param result_range: (optional vector form) values are returned from here
    :return: #N/A if not found else value

@excel_helper(cse_params=0, err_str_params=None)
def istext(arg):
    # Excel reference: https://support.office.com/en-us/article/
    #   is-functions-0f2d7971-6019-40a0-a171-f2d869135665
    return isinstance(arg, str) and arg not in ERROR_CODES

@excel_helper(cse_params=0, err_str_params=None)
def isnumber(value):
    # Excel reference: https://support.office.com/en-us/article/
    #   is-functions-0f2d7971-6019-40a0-a171-f2d869135665
    return isinstance(value, (int, float))

@excel_helper(err_str_params=-1)
def edate(start_date, months):
    # Excel reference: https://support.office.com/en-us/article/
    #   edate-function-3c920eb2-6e66-44e7-a1f5-753ae47ee4f5
    return months_inc(start_date, months)

@excel_helper(cse_params=0, bool_params=3, number_params=2)
def vlookup(lookup_value, table_array, col_index_num, range_lookup=True):
    """ Vertical Lookup

    :param lookup_value: value to match (value or cell reference)
    :param table_array: range of cells being searched.
    :param col_index_num: column number to return
    :param range_lookup: True, assumes sorted, finds nearest. False: find exact
    :return: #N/A if not found else value
    """
    # Excel reference: https://support.office.com/en-us/article/
    #   VLOOKUP-function-0BBC8083-26FE-4963-8AB8-93A18AD188A1

    if not list_like(table_array):
        return NA_ERROR

    if col_index_num <= 0:

@excel_helper(cse_params=0, number_params=(1, 2))
def replace(old_text, start_num, num_chars, new_text):
    # Excel reference: https://support.office.com/en-us/article/
    #   replace-replaceb-functions-8d799074-2425-4a8a-84bc-82472868878a
    old_text = coerce_to_string(old_text)
    new_text = coerce_to_string(new_text)
    start_num = int(start_num) - 1
    num_chars = int(num_chars)
    if start_num < 0 or num_chars < 0:
        return VALUE_ERROR
    return '{}{}{}'.format(
        old_text[:start_num], new_text, old_text[start_num + num_chars:])

@excel_helper(cse_params=0)
def trim(text):
    # Excel reference: https://support.office.com/en-us/article/
    #   trim-function-410388fa-c5df-49c6-b16c-9e5630b479f9
    return RE_MULTI_SPACE.sub(' ', coerce_to_string(text))

@excel_helper(cse_params=0)
def upper(text):
    # Excel reference: https://support.office.com/en-us/article/
    #   upper-function-c11f29b3-d1a3-4537-8df6-04d0049963d6
    return coerce_to_string(text).upper()