Hi,

Here's a simple example of how you can integrate PDF compression with a button-click action in an Odoo model:

from odoo import models, fields, api

import PyPDF2

class MyModel(models.Model):

    _name = 'my.model'

    name = fields.Char(string="Name")

    pdf_file = fields.Binary(string="PDF File")

    @api.multi

    def compress_pdf(self):

        for record in self:

            input_pdf = PyPDF2.PdfFileReader(io.BytesIO(base64.b64decode(record.pdf_file)))

            output_pdf = PyPDF2.PdfFileWriter()

            for page_num in range(input_pdf.numPages):

                page = input_pdf.getPage(page_num)

                output_pdf.addPage(page)

            output_stream = io.BytesIO()

            output_pdf.compressContentStreams()

            output_pdf.write(output_stream)

            record.pdf_file = base64.b64encode(output_stream.getvalue())

            output_stream.close()

Make sure to adjust the code according to your specific requirements and the structure of your Odoo module. Additionally, don't forget to handle error cases and edge scenarios appropriately.

Hope it helps