def point_pos(self, left=0, top=0):
        current_col = 1
        current_row = 1
        column_dimensions = self.column_dimensions
        row_dimensions = self.row_dimensions
        default_width = points_to_pixels(DEFAULT_COLUMN_WIDTH)
        default_height = points_to_pixels(DEFAULT_ROW_HEIGHT)
        left_pos = 0
        top_pos = 0

        while left_pos <= left:
            letter = get_column_letter(current_col)
            current_col += 1
            if letter in column_dimensions:
                cdw = column_dimensions[letter].width
                if cdw is not None:
                    left_pos += points_to_pixels(cdw)
                    continue
            left_pos += default_width

        while top_pos <= top:
            row = current_row
            current_row += 1
            if row in row_dimensions:
                rdh = row_dimensions[row].height
                if rdh is not None:
                    top_pos += points_to_pixels(rdh)
                    continue
            top_pos += default_height

        return (letter, row)
tells which cell is under the given coordinates (in pixels)
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/openpyxl-2.3.0-b2/openpyxl/worksheet/worksheet.py/Worksheet.point_pos