error in generating pdf using pdfkit in flask google app engine

[user6948460 via StackOverflow]

I am trying to generate pdf using pdfkit in flask . pdfkit is working fine in python but when i am using it in flask ,it is giving below error.

here is my flask code

from flask import Flask, make_response, request,render_template
import pdfkit

path_wkthmltopdf = r'C:\Python27\flaskapp\wkhtmltopdf\bin\wkhtmltopdf.exe'

config = pdfkit.configuration(wkhtmltopdf=path_wkthmltopdf)
app = Flask(__name__)

@app.route('/pdf', methods=['POST', 'GET'])
def pdf():


  if request.method == 'POST':

    my_string =request.form['text11']
    pdf = pdfkit.from_string(my_string,False , configuration=config)

    response=make_response(pdf)
    response.headers['Content-Type'] = 'application/pdf'
    response.headers['Content-Disposition'] = 'inline; filename=out.pdf'

    return response
  return render_template('pdff.html')

please help . please dont downvote .i have tried everything .but cound not found it solution

and sorry for my bad english

here is error

Traceback (most recent call last):

  File "C:\Python27\flaskapp\flask\app.py", line 1687, in wsgi_app

    response = self.full_dispatch_request()

  File "C:\Python27\flaskapp\flask\app.py", line 1360, in full_dispatch_request

    rv = self.handle_user_exception(e)

  File "C:\Python27\flaskapp\flask\app.py", line 1358, in full_dispatch_request

    rv = self.dispatch_request()

  File "C:\Python27\flaskapp\flask\app.py", line 1344, in dispatch_request

    return self.view_functions[rule.endpoint](**req.view_args)

  File "C:\Python27\flaskapp\main.py", line 17, in yout

    pdf = pdfkit.from_string(my_string,False , configuration=config)

  File "C:\Python27\flaskapp\pdfkit\api.py", line 68, in from_string

    return r.to_pdf(output_path)

  File "C:\Python27\flaskapp\pdfkit\pdfkit.py", line 92, in to_pdf

    result = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE,

AttributeError: 'module' object has no attribute 'Popen'

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http://stackoverflow.com/questions/40506984/error-in-generating-pdf-using-pdfkit-in-flask-google-app-engine

[bigblind via StackOverflow]

This code won't run on Google App Engine, because App Engine's Python runtime environment doesn't allow calls to subprocess.Popen or any other call that starts another process.

Please DO NOT REPLY directly to this email but go to StackOverflow:

http://stackoverflow.com/questions/40506984/error-in-generating-pdf-using-pdfkit-in-flask-google-app-engine/40507204#40507204