S.Infinity.is_nonzero returns False

[ghost]

>>> sympy.__version__
'1.8.dev'
>>> S.Infinity.is_nonzero
False

[ghost]

I would like to work on this issue, but I am not able to exactly find where the problem lies.

[jksuom]

The meaning of nonzero is not the same as that of 'not zero'.
From sympy/core/assumptions:

   nonzero
        object is a real number that is not zero.

Infinities are not real numbers and therefore S.Infinity.is_nonzero is False.

[ghost]

Isn't this is a little problematic though?
For example I would expect is_zero and is_nonzero to be complementary of each other .

zero
        object has the value of ``0``.

[oscarbenjamin]

There is is_extended_nonzero which corresponds to the extended reals:

In [3]: oo.is_extended_nonzero
Out[3]: True