def rc2cell(row, col):
    """Convert zero-based row and column to Excel cell identifier.

    Args:
        row (int): Row number (zero-based)
        col (int): Column number (zero-based)

    Returns:
        str: Excel cell identification string.
    """
    if col <= 0:
        cell_col = 'A'
    else:
        cell_col = ''
        col += 1
        while col > 0:
            col, temp = divmod(col, 26)
            if temp < 1:
                temp = 26
                col -= 1
            cell_col += chr(64 + temp)
        cell_col = cell_col[::-1]
    cell_row = int(max(row, 0)) + 1
    return '{0}{1}'.format(cell_col, cell_row)