[Tutor] Need help printing a pickled data

[Matt D]

> 
> with open('mypicklelog.txt','ab') as log: # open in binary mode
>     pickle.dump(self.data, log) # serialize data and write to file
> 
> where pickle.dump(obj, file) converts `obj` to a sequence of bytes before it 
> is written to `file`.
> 

I put this like this:

 class DataEvent(wx.PyEvent):
    # the values of the text fields get passed into the constructor
inside of data
    def __init__(self, data):
        wx.PyEvent.__init__(self)
        # this line *binds* this class to a certain type of event,
wxDATA_EVENT
        self.SetEventType (wxDATA_EVENT)
        # and this is the actual data
        self.data = data
        with open('mypicklelog.txt','ab') as log: # open in binary mode
            pickle.dump(self.data, log) # serialize data and write to file


And I still get nothing.  This has me super confused, I have trying at
this for a long time and I have been reading the docs like

http://docs.python.org/2/library/pickle.html

And I still don't get it to work. So the C++ makes the pickle, this is
from the comments in the C++ :

/**
 * snapshot_du_handler. Writes traffic snapshots to a msg_queue based
 * on the HDU frame contents. The format used is that of a pickled
 * python dictionary allowing the other end of the queue to pick only
 * those fields of interest and ignore the rest.
 */

Then the python program (attached) program unpickles and repickles it?
I attached the python program, if you have a minute or two please take a
look, its not too long.
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