重复出现 Failed to get QR Code about itchat HOT 10 CLOSED

import requests, itchat, platform, subprocess, os

uuid = itchat.get_QRuuid()
url = '%s/qrcode/%s'%('https://login.weixin.qq.com', uuid)
r = requests.get(url, stream = True)
QR_DIR = 'QR.jpg'
with open(QR_DIR, 'wb') as f: f.write(r.content)
if platform.system() == 'Darwin':
    subprocess.call(['open', QR_DIR])
elif platform.system() == 'Linux':
    subprocess.call(['xdg-open', QR_DIR])
else:
    os.startfile(QR_DIR)

Traceback (most recent call last):
  File "test3.py", line 11, in <module>
    subprocess.call(['xdg-open', QR_DIR])
  File "/usr/lib/python2.7/subprocess.py", line 522, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

import requests, itchat, platform, subprocess, os

uuid = itchat.get_QRuuid()
url = '%s/qrcode/%s'%('https://login.weixin.qq.com', uuid)
r = requests.get(url, stream = True)
QR_DIR = "./QR.jpg"

print uuid
with open(QR_DIR, 'wb') as f: f.write(r.content)


print QR_DIR
if platform.system() == 'Darwin':
    subprocess.call(['open', QR_DIR])
elif platform.system() == 'Linux':
    subprocess.call(['cacaview', QR_DIR])
else:
    os.startfile(QR_DIR)

import requests, itchat, platform, subprocess, os

from PIL import Image
import sys

BLOCK = 'MM'
class QRCode():
    def __init__(self, fileName, size, padding = 0, background = 'BLACK'):
        self.size = size
        self.padding = padding
        self.img = Image.open(fileName)
        self.times = self.img.size[0]/(size + padding * 2)
        self.rgb = self.img.convert('RGB')
        self.white = BLOCK if background == 'BLACK' else '  '
        self.black = '  ' if background == 'BLACK' else BLOCK
    def print_qr(self):
        sys.stdout.write(' '*50 + '\r')
        sys.stdout.flush()
        print(self.white * (self.size + 2))
        startPoint = self.padding + 0.5
        for y in range(self.size):
            sys.stdout.write(self.white)
            for x in range(self.size):
                r,g,b = self.rgb.getpixel(((x + startPoint) * self.times, (y + startPoint) * self.times))
                sys.stdout.write(self.white if r > 127 else self.black)
            print(self.white)
        print(self.white * (self.size + 2))


uuid = itchat.get_QRuuid()
url = '%s/qrcode/%s'%('https://login.weixin.qq.com', uuid)
r = requests.get(url, stream = True)
QR_DIR = './QR.jpg'

print uuid
with open(QR_DIR, 'wb') as f: f.write(r.content)

print QR_DIR
if platform.system() == 'Darwin':
    subprocess.call(['open', QR_DIR])
elif platform.system() == 'Linux':
#    subprocess.call(['cacaview', QR_DIR])
    q =  QRCode(QR_DIR, 37, 3, 'BLACK')
    q.print_qr()
else:
    os.startfile(QR_DIR)