[Pydev-users] [Users] gevent makes PyDev test runner dysfunctional

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The following forum message was posted by piotr_dobrogost at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4943837:

Hi!

It seems using socket module patched by gevent lib makes PyDev test runner
dysfunctional.


PyDev test runner uses xmlrpclib (which in turn uses httplib, which in turn
uses socket). Running any test where socket is patched by gevent makes test
runner fail with "NotImplementedError: gevent is only usable from a single
thread".

Below is a "test case" and output.
In case someone knows how to handle this I would gladly hear the solution.

[code]from gevent import monkey
monkey.patch_all(socket=True, # socket=False makes PyDev test runner run ok 
				 dns=True, time=True, select=True, thread=True, 
			     os=True, ssl=True, httplib=False, aggressive=True)

import gevent
import unittest

def gevent_spawn():

	def f(x):
	    print "f: ", x

	greens = [gevent.spawn(f, x) for x in range(4)]
	gevent.joinall(greens)


class Test(unittest.TestCase):
	def test(self):
		gevent_spawn()
		

if __name__ == '__main__':
	gevent_spawn()[/code]

OUTPUT

[code]pydev debugger: starting
Finding files... done.
Importing test modules ... done.
Traceback (most recent call last):
  File "C:\eclipse\indigo\plugins\org.python.pydev.debug_2.3.0.2011122300\pysrc\
pydev_runfiles_xml_rpc.py", line 131, in run
    self.server.notifyCommands(commands)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1224, in __call__

    return self.__send(self.__name, args)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1575, in __request
    verbose=self.__verbose
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1264, in request
    return self.single_request(host, handler, request_body, verbose)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1292,
in single_request
    self.send_content(h, request_body)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1439,
in send_content
    connection.endheaders(request_body)
  File "c:\program files\python\2.7\Lib\httplib.py", line 951, in endheaders
    self._send_output(message_body)
  File "c:\program files\python\2.7\Lib\httplib.py", line 811, in _send_output
    self.send(msg)
  File "c:\program files\python\2.7\Lib\httplib.py", line 773, in send
    self.connect()
  File "c:\program files\python\2.7\Lib\httplib.py", line 754, in connect
    self.timeout, self.source_address)
  File "C:\python\virtualenv\envX\lib\site-packages\gevent-0.13.6-py2.7-win-amd6
4.egg\gevent\socket.py", line 641, in create_connection
f:     sock.connect(sa)
 0  File "C:\python\virtualenv\envX\lib\site-packages\gevent-0.13.6-py2.7-win-am
d64.egg\gevent\socket.py", line 371, in connect

    wait_readwrite(sock.fileno(), event=self._rw_event)
  File "C:\python\virtualenv\envX\lib\site-packages\gevent-0.13.6-py2.7-win-amd6
4.egg\gevent\socket.py", line 215, in wait_readwrite
f:     switch_result = get_hub().switch()
 1
  File "C:\python\virtualenv\envX\lib\site-packages\gevent-0.13.6-py2.7-win-amd6
4.egg\gevent\hub.py", line 135, in get_hub
f:  2
    raise NotImplementedError('gevent is only usable from a single thread')
f:  3
NotImplementedError: gevent is only usable from a single thread
----------------------------------------------------------------------
Ran 1 test in 0.012s

OK
Traceback (most recent call last):
  File "C:\eclipse\indigo\plugins\org.python.pydev.debug_2.3.0.2011122300\pysrc\
pydev_runfiles_xml_rpc.py", line 131, in run
    self.server.notifyCommands(commands)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1224, in __call__
    return self.__send(self.__name, args)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1575, in __request
    verbose=self.__verbose
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1264, in request
    return self.single_request(host, handler, request_body, verbose)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1292,
in single_request
    self.send_content(h, request_body)
  File "c:\program files\python\2.7\Lib\xmlrpclib.py", line 1439,
in send_content
    connection.endheaders(request_body)
  File "c:\program files\python\2.7\Lib\httplib.py", line 951, in endheaders
    self._send_output(message_body)
  File "c:\program files\python\2.7\Lib\httplib.py", line 811, in _send_output
    self.send(msg)
  File "c:\program files\python\2.7\Lib\httplib.py", line 773, in send
    self.connect()
  File "c:\program files\python\2.7\Lib\httplib.py", line 754, in connect
    self.timeout, self.source_address)
  File "C:\python\virtualenv\envX\lib\site-packages\gevent-0.13.6-py2.7-win-amd6
4.egg\gevent\socket.py", line 641, in create_connection
    sock.connect(sa)
  File "C:\python\virtualenv\envX\lib\site-packages\gevent-0.13.6-py2.7-win-amd6
4.egg\gevent\socket.py", line 371, in connect