Flask generating a file for download

[darktitan]

Hi
Im new att flask. Im trying to port an desktop app i made to the web so im using flask to do it.
Well what im trying to do is to generate a file with a list of data typed in a form in the html and then make it available for download and later on the file gets removed.

here is my code so far

@app.route('/result',methods = ['POST', 'GET'])
def result():
   if request.method == 'POST':
      cablename = request.form['cablename']
      parts = int(request.form['parts'])
      result = request.form
      print('{}.{}'.format(cablename, parts))

      for part in range(parts):
          print('{}.{}'.format(cablename, part+1))
          file1.writelines('{}.{}\n'.format(cablename, part+1))
          file1.flush()
          
      return render_template("result.html",result = result)

This code makes a file with a list of the data but i dont know how to make it available for download and im not sure if its the best way to do it.

So my questions are there a better way to do it maybe buffer all the data before generate the file with it for download and after download it gets removed.