How to display a pdf that has been downloaded in python

Question

I have grabbed a pdf from the web using for example

import requests
pdf = requests.get("http://www.scala-lang.org/docu/files/ScalaByExample.pdf")

I would like to modify this code to display it

from gi.repository import Poppler, Gtk

def draw(widget, surface):
    page.render(surface)

document = Poppler.Document.new_from_file("file:///home/me/some.pdf", None)
page = document.get_page(0)

window = Gtk.Window(title="Hello World")
window.connect("delete-event", Gtk.main_quit)
window.connect("draw", draw)
window.set_app_paintable(True)

window.show_all()
Gtk.main()

How do I modify the document = line to use the variable pdf that contains the pdf?

(I don't mind using popplerqt4 or anything else if that makes it easier.)

Answer 1

It all depends on the OS your using. These might usually help:

import os
os.system('my_pdf.pdf')

or

os.startfile('path_to_pdf.pdf')

or

import webbrowser
webbrowser.open(r'file:///my_pdf.pdf')

Answer 2

How about using a temporary file?

import tempfile
import urllib
import urlparse

import requests

from gi.repository import Poppler, Gtk

pdf = requests.get("http://www.scala-lang.org/docu/files/ScalaByExample.pdf")

with tempfile.NamedTemporaryFile() as pdf_contents:
    pdf_contents.file.write(pdf)
    file_url = urlparse.urljoin(
        'file:', urllib.pathname2url(pdf_contents.name))
    document = Poppler.Document.new_from_file(file_url, None)