I was wondering if anyone had any good solutions to the pickling error I am having at the moment. I am trying to set my code up to open several different processes in parallel, each with a fitting process to be display on a matplotlib canvas in real time. Within my main application, I have a button which activates this function:

Code:
    def process_data(self):
        process_list = []
        for tab in self.tab_list:
            process_list.append(mp.Process(target=process_and_fit, args=(tab,)))
            process_list[-1].start()
            process_list[-1].join()
        return
As you may notice, a 'tab' (PyQt4.QtGui.QTabWidget object) is passed to the function process_and_fit, which I have noticed is not able to be pickled readily (link here) .
However, I am not certain how to change the code to get rid of the frame being passed since it needs to be called in the process_and_fit function indirectly. By indirectly I mean something like this: (psuedo code again)

Code:
def process_and_fit(tab): # this just sets up and starts the fitting process
        result = lmfit.Minimizer(residual, parameters, fcn_args=(tab,))
        result.prepare_fit()
        result.leastsq()
    
def residual(params, tab):
    residual_array = Y - model
    tab.refreshFigure()
    return residual_array

class tab(QtGui.QTabWidget):
    def __init__(self, parent, spectra):
       # stuff to initialize the tab widget and hold all of the matplotlib lines and canvases
        
    # This just refreshes the GUI stuff everytime that the parameters are fit in the least squares method
    def refreshFigure(self):     
        self.line.set_data(self.spectra.X, self.spectra.model)
        self.plot.draw_artist(self.line)
        self.plot.figure.canvas.blit(self.plot.bbox)
Does anyone know how to get around this pickling error since the tab associated with a process should have only one set of data associated with it? I looked at Steven Bethard's approach but I really didn't understand where to put the code or how to utilize it. (I am a chemical engineer, not a computer scientist so there's a lot that I don't understand)

Any help is greatly appreciated.