[yt-users] Pickling YT objects

[Sam Geen]

Hi,

I'm making plots of my data and I want to save them as pickle files so I 
can load them later and perhaps mess with the colour map limits, say, 
without reprocessing all the data (I have about 9TB to go through). When 
I tried this I got the error: "TypeError: can't pickle instancemethod 
objects"

Do you know if this is possible, or some variant of it? I'm running:

     pf = yt.mods.load(file_location)
     prj = yt.mods.ProjectionPlot(pf, 2, var, center=[0.5, 0.5, 0.5],
                      width=(rlim, 'pc'), weight_field=None)

and trying to pickle prj, when I get the error. prj appears to be a 
yt.visualization.plot_window.ProjectionPlot object and not an instance 
method, but I could be wrong.

At least it could be good to save the 2D image array and link it back 
later to a YT plot object, but I don't know much about the internal 
workings of the plot objects as to whether this is possible or not.

Thanks,

Sam