Python error cannot open pdf in application from python

I am using windows 10 and python 2.7.13. My goal is to open the pdf file in acrobat reader at a specific page number. I am using the code I got from one of the questions on the forum here.

import subprocess
import os

path_to_pdf = os.path.abspath('C:\test_file.pdf')
# I am testing this on my Windows Install machine
path_to_acrobat = os.path.abspath('C:\Program Files (x86)\Adobe\Reader 10.0\Reader\AcroRd32.exe') 

# this will open your document on page 12
process = subprocess.Popen([path_to_acrobat, '/A', 'page=12', path_to_pdf], shell=False, stdout=subprocess.PIPE)
process.wait()

      

        
        
        
      

    

It opens the acrobat reader application, but the file does not open, and I get the error: "Error opening this document. Invalid file name, directory name or volume label syntax

but when i use these commands in cmd without python i can successfully open pdf without error. Please, help.