Updates:
Status: Accepted
Comment #1 on issue 1349 by mattpap: 'int' object has no attribute 'is_Add'
http://code.google.com/p/sympy/issues/detail?id=1349
Thanks for reporting this.
It fails in an interactive session because you try to pretty print it. This
an
obvious bug in Poly.add_term, mainly lack of sympification of the input
argument.
This works:
In [1]: f = Poly((), x,y,z)
In [2]: g = f.add_term(12, (1,2,3))
But [2] will fail when printing it. For now you have to be explicit:
In [3]: f.add_term(Integer(12), (1,2,3))
Out[3]: Poly(12*x*y**2*z**3, x, y, z)
I'm sure there are other bugs of this kind in several Poly.* functions.
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