最近用 wxpy 这个模块实现微信功能，程序运行了一段时间，突然有一天扫码后，迟迟不登录，ctrl+c 终止程序后报错如下：
/usr/local/lib/python2.7/dist-packages/wxpy/api/bot.py, line 88, in __init__
except FileNotFoundError as e:
NameError: global name 'FileNotFoundError' is not defined
于是把bot.py中88行的
except FileNotFoundError as e:
修改为:
except IOError as e:
再次扫码登录，报错如下：
Traceback (most recent call last):
File "./copyUSB.py", line 12, in
bot = wxpy.Bot()
File "/usr/local/lib/python2.7/dist-packages/wxpy/api/bot.py", line 86, in __init__
loginCallback=login_callback, exitCallback=logout_callback
File "/usr/local/lib/python2.7/dist-packages/itchat/components/register.py", line 36, in auto_login
loginCallback=loginCallback, exitCallback=exitCallback)
File "/usr/local/lib/python2.7/dist-packages/itchat/components/login.py", line 49, in login
picDir=picDir, qrCallback=qrCallback)
File "/usr/local/lib/python2.7/dist-packages/itchat/components/login.py", line 123, in get_QR
utils.print_qr(picDir)
File "/usr/local/lib/python2.7/dist-packages/itchat/utils.py", line 83, in print_qr
subprocess.call(['xdg-open', fileDir])
File "/usr/lib/python2.7/subprocess.py", line 168, in call
return Popen(*popenargs, **kwargs).wait()
File "/usr/lib/python2.7/subprocess.py", line 1073, in wait
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
File "/usr/lib/python2.7/subprocess.py", line 121, in _eintr_retry_call
return func(*args)
KeyboardInterrupt
其中：
subprocess.call(['xdg-open', fileDir]) #应该是系统调用Linux桌面程序打开二维码图片
及相关：
File "/usr/lib/python2.7/subprocess.py", line 168, in call
return Popen(*popenargs, **kwargs).wait()
File "/usr/lib/python2.7/subprocess.py", line 1073, in wait
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
File "/usr/lib/python2.7/subprocess.py", line 121, in _eintr_retry_call
return func(*args)
我怀疑是wxpy对Linux图形下的二维码处理有bug,所以决定把微信二维码显示在文本终端上：
bot = wxpy.Bot()
改为
bot = wxpy.Bot(console_qr=True)
重新运行程序，文本终端扫码登录成功。
The end.