Launch pdf and close on delete window event

[ashtona]

Ok here is the code I have now. I use multiprocessing to launch the pdf, however it's still not closing my file.

def LaunchPDF(filename):
    """
    Launches PDF by filename and tracks PID
    @param filename, the name of the file to launch
    @return None
    """
    print(filename)
    os.startfile(filename)

def QueryShubertFiles(self):
    """
    Queries the blob data from table based on filename.
    @param, self the App object.
    @return None.
    """
    for element in self.SectionList.curselection():
       value = self.Query("SELECT Data FROM ShubertDocs WHERE Filename = '" + self.SectionList.get(element) + "';")
       if ".JPG" in self.SectionList.get(element):
           bio = BytesIO(value[0][0])
           Image.open(bio).show()
       elif ".PDF" in self.SectionList.get(element) or ".pdf" in self.SectionList.get(element):
           #track files saved to disk
           self.saved_files.append(self.SectionList.get(element))
           try:
               with open(self.SectionList.get(element), 'wb') as f:
                   f.write(value[0][0])
           except:
               pass
           #doc = Popen("start /WAIT " + self.SectionList.get(element), shell=True)
           self.processes.append(multiprocessing.Process(target=LaunchPDF, args=(self.SectionList.get(element),)))
           self.processes[-1].start()


def on_closing(self):
        self.window.destroy()
        
        ## wait 2 seconds and kill all processes
        time.sleep(2)
        print(self.processes)
        for process in self.processes:
            process.terminate()
            process.join()
            print(process, "terminated")

        #clean up 
        for file in self.saved_files:
            os.remove(file)

When I print the processes it tells me they are all stopped, then when I attempt to remove the files I receive a process is still being used. The pdf never closes.