docs: 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:
  
      >>> rowcol_to_a1(1, 1)
      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