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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 rowcol_to_a1(row, col):
 """Translates a row and column cell address to A1 notation. :param row: The row of the cell to be converted. Rows start at index 1. :type row: int, str :param col: The column of the cell to be converted. Columns start at index 1. :type row: int, str :returns: a string containing the cell's coordinates in A1 notation. Example: A1 """

    row = int(row)
    col = int(col)

    if row < 1 or col < 1:
        raise IncorrectCellLabel('(%s, %s)' % (row, col))

    div = col
    column_label = ''

    while div:
        (div, mod) = divmod(div, 26)
        if mod == 0:
            mod = 26
            div -= 1
        column_label = chr(mod + MAGIC_NUMBER) + column_label

    label = '%s%s' % (column_label, row)

    return label