Are there plans for pickle support? #205
Description
Hi,
just noticed that symengine expressions can not be pickled.
In [1]: from symengine import *
In [2]: import pickle
In [3]: x, y = var("x, y")
In [4]: pickle.dumps(x + y)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-4-134907157bd4> in <module>()
----> 1 pickle.dumps(x + y)
TypeError: can't pickle Add objectsAre there any future plans to support that?