saving Radiosource object

[tyoo37]

the instance "dump" in radiosource.py seems not working.
the variable "obj" is not defined.

When I forced to save the Radiosource object by using pickle, I encountered the error

TypeError: cannot pickle '_io.FileIO' object

In

with open('save/dend_w51e_B6_%d_%d_%d.pickle'%(min_value_factor, min_delta_factor, min_npix), 'wb') as outp:
    pickle.dump(source_object_b6, outp)
source_object_b6.plot_grid(skip_rejects=False,vmin=-0.00044910456346381985,vmax=0.00663930691411708,figsize=150)
dendrocat.utils.saveregions(source_object_b6.catalog, 'save/dend_w51e_B6_%d_%d_%d.reg'%(min_value_factor, min_delta_factor, min_npix))
custom_dendro_b6.save_to('save/dend_w51e_B6_%d_%d_%d.fits'%(min_value_factor, min_delta_factor, min_npix))```