Metaclass >> How to access methods of <netref class 'numpy.ndarray'> ?

[baco]

Hi all,

I have a <netref class 'numpy.ndarray'> object (server side) and I can't access to any of method (in particular the .tostring()). 

Data from this object is ok, but need to have the 'real' numpy.ndarray from my client, to use it.

thanks for help

-baco

[Tomer Filiba]

you'd have to provide a code snippet that reconstructs the problem.

but if ultimately need to copy the ndarray from one process to another (passing it by value),

you can use obtains. see http://rpyc.sourceforge.net/api/utils_classic.html#rpyc.utils.classic.obtain

-----------------------------------------------------------------

Tomer Filiba  tomerfiliba.com

[baco]

thanks again for your huge work around RPyC and support.

I will try the obtain method

By the way,

my RPyC tests project is to have two servers: 

-One to get photo from webcam/camera (via opencv) => WebCamService

-Andd another server for update a wxPython Gui (with wxStaticBitmap => GuiService

In the middle of this two servers a client which launch both servers and get an image through a exposed_function   "def exposed_GetPhoto(self)" of webcamService (use service like this in my client "webcam=cWebcam.root.last_photo").

At this point the webcam is a <netref class 'numpy.ndarray'> but I get use any tostring(), copy() method from numpy without problem...

But when I send 'webcam' to my Gui server through a exposed_function "def exposed_SetPhoto(self,photo)" of my RPyC GuiService, I can visualize the ndarray but I can't use methods on it (server side°

I hope, my explanation was clear.

best regards,

-damien 

Le lundi 25 juin 2012 17:54:15 UTC+2, Tomer Filiba a écrit :

you'd have to provide a code snippet that reconstructs the problem.

but if ultimately need to copy the ndarray from one process to another (passing it by value),

you can use obtains. see http://rpyc.sourceforge.net/api/utils_classic.html#rpyc.utils.classic.obtain

-----------------------------------------------------------------

Tomer Filiba  tomerfiliba.com

[baco]

Hi Tomer,

I rewrite some code to show the problem, I described below:

-s1.py : the service server to get array info asked by client.py

-s2.py: the gui: show information send by client.py

-client.py: get information from any device/source info, compile and use an remote GUI to show info

Again, the aim of this project is to get infos from devices servers, compile info in client.py then send infos to some gui server.

Clearly this example have no sense, but only show the error about the access to the method tostring().

Hope it helps !

####s1.py

'''

Server 1 : serve an array

'''

import rpyc,sys

from rpyc.utils.server import ThreadedServer

import numpy as np

class ArrayService(rpyc.Service):        

  def exposed_GetArray(self):

    array=np.array([[1,2,3],[4,5,6]])

    return array

if __name__ == "__main__":

  if len(sys.argv)==2: port = int(sys.argv[1])

  else: port = 2222

  server = ThreadedServer(ArrayService, port = port,hostname="localhost",protocol_config={'allow_all_attrs':True})

  server.start()

####s2.py

'''

Server 2  Gui for Array

'''

import rpyc,sys

from rpyc.utils.server import ThreadedServer

#import numpy as np

import numpy as np

class WatchService(rpyc.Service):        

  def exposed_ShowArray(self,array):

    print array.tostring() #it fails!

    return True

if __name__ == "__main__":

  if len(sys.argv)==2: port = int(sys.argv[1])

  else: port = 2223

  server = ThreadedServer(WatchService, port = port,hostname="localhost",protocol_config={'allow_all_attrs':True})

  server.start()

#####client.py

# -*- coding: UTF-8 -*-

'''

Client get from Server1 (s1.py) to Server2 (s2.py)

'''

import rpyc,time,subprocess,os,signal

proc=[]

proc.append(subprocess.Popen(r"python .\s1.py "+str(2222),  bufsize=-1, creationflags = subprocess.CREATE_NEW_CONSOLE).pid)

proc.append(subprocess.Popen(r"python .\s2.py "+str(2223),  bufsize=-1, creationflags = subprocess.CREATE_NEW_CONSOLE).pid)

time.sleep(1)

Server1=rpyc.connect("localhost",2222)

Server2=rpyc.connect("localhost",2223)

array=Server1.root.GetArray()

print array.tostring() #it works!

Server2.root.ShowArray(array)

for i in range(len(proc)):

  time.sleep(0.1)

  print "kill ",proc[i],'   ',os.kill(proc[i],signal.SIGTERM )==None

regards,

-damien

Le lundi 25 juin 2012 17:54:15 UTC+2, Tomer Filiba a écrit :

[Enrique Soto Mendoza]

Hi baco, 

I'm stucked in the same issue. Did you overcome it? 

Thanks

[Hamza Anis]

Do someone know what's the problem here. Why object is changing to netref?

[Hamza Anis]

If some one has the same issue. Refer to this issue #154