Test open files on requests

requests_files.py

import psutil
import requests


def open_files():
    proc = psutil.Process()
    return proc.open_files()


print 'on start:', open_files()
f = open('/etc/hosts', 'r')
print 'hosts file opened:', open_files()
f.close()
print 'hosts file closed:', open_files()
print

url = 'http://httpbin.org/post'
multiple_files = [
        ('images', ('hosts', open('/etc/hosts', 'rb'), 'plain/text')),
        ('images', ('resolv.conf', open('/etc/resolv.conf', 'rb'), 'plain/text'))]
r = requests.post(url, files=multiple_files)
print 'after request:', open_files()

on start: []
hosts file opened: [popenfile(path='/etc/hosts', fd=3, position=0, mode='r', flags=32768)]
hosts file closed: []

after request: [popenfile(path='/etc/hosts', fd=3, position=365, mode='r', flags=32768), popenfile(path='/etc/resolv.conf', fd=4, position=100, mode='r', flags=32768)]