from odoo import api, fields, models
from odoo.exceptions import UserError


class ProductCategoryReport(models.TransientModel):
    _name = 'item.sales.wizard'
    _description = "Print Item Wise Sales Report"

    date_from = fields.Datetime('From', required=False)
    date_to = fields.Datetime('To', default=lambda self: fields.datetime.now(), required=False)
    categ_ids = fields.Many2many('product.category', string="Category", required=True)

    def action_excel_report(self):
        data = {
            'date_from': self.date_from,
            'date_to': self.date_to,
            'categ_ids': self.categ_ids.ids
        }

        return self.env.ref('item_wise_sales_report.action_item_sales_report_xlsx').report_action(self,
                                                                                                  data=data)

    def action_report(self):
        product_list = self.env['sale.order.line'].search([], order='product_id,create_date asc')
        categ_list_groupby_dict = {}
        for categories in self.categ_ids:
            filtered_product_list = list(filter(lambda x: x.product_id.categ_id == categories, product_list))
            if self.date_from and self.date_to:
                filtered_by_date = list(
                    filter(lambda x: x.create_date >= self.date_from and x.create_date <= self.date_to,
                           filtered_product_list))
            elif self.date_from:
                filtered_by_date = list(filter(lambda x: x.create_date >= self.date_from,
                                               filtered_product_list))
            elif self.date_to:
                filtered_by_date = list(filter(lambda x: x.create_date <= self.date_to,
                                               filtered_product_list))
            categ_list_groupby_dict[categories.name] = filtered_by_date
        final_dist = {}
        for categories in categ_list_groupby_dict.keys():
            product_data = []
            for products in categ_list_groupby_dict[categories]:
                temp_data = []
                temp_data.append(products.product_template_id.name)
                temp_data.append(products.qty_invoiced)
                temp_data.append(products.product_uom.name)
                temp_data.append(products.price_subtotal)
                product_data.append(temp_data)
            final_dist[categories] = product_data
        datas = {
            'ids': self,
            'model': 'product.category.wizard',
            'form': final_dist,
            'date_from': self.date_from,
            'date_to': self.date_to,

        }
        return self.env.ref('item_wise_sales_report.action_item_sales_report').report_action([], data=datas)

Here sale order line how can i merge same product. here this report same product, quantity and price_subtotal are showing many time. But I want to show same product only one time How can I do that. Please help me.