Hi, As per https://github.com/sympy/sympy/issues/6212, is_real is deprecated. I just found this:
>>> s = FiniteSet(FiniteSet(1, 2, 3)) >>> s {{1, 2, 3}} >>> len(s) 1 >>> s.powerset() /usr/lib/python3.3/site-packages/sympy-0.7.5_git-py3.3.egg/sympy/functions/elementary/miscellaneous.py:334: SymPyDeprecationWarning: is_real has been deprecated since SymPy 0.7.6. Use is_subset(Reals) instead. See https://github.com/sympy/sympy/issues/6212 for more info. if (arg.is_real is False) or (arg is S.ComplexInfinity): /usr/lib/python3.3/site-packages/sympy-0.7.5_git-py3.3.egg/sympy/core/basic.py:577: SymPyDeprecationWarning: is_real has been deprecated since SymPy 0.7.6. Use is_subset(Reals) instead. See https://github.com/sympy/sympy/issues/6212 for more info. is_real = self.is_real {EmptySet(), {{1, 2, 3}}} In my opinion, the deprecation warnings should be shown only when the library user is invoking the deprecated method/property. Hence, i think usage of is_real from SymPy's code base should be removed. For what it's worth, the first is easy: diff --git a/sympy/functions/elementary/miscellaneous.py b/sympy/functions/elementary/miscellaneous.py index 8adf46d..0935b03 100644 --- a/sympy/functions/elementary/miscellaneous.py +++ b/sympy/functions/elementary/miscellaneous.py @@ -331,7 +331,7 @@ def _new_args_filter(cls, arg_sequence): for arg in arg_sequence: # pre-filter, checking comparability of arguments - if (arg.is_real is False) or (arg is S.ComplexInfinity): + if not arg.is_subset(S.Reals) or arg is S.ComplexInfinity: raise ValueError("The argument '%s' is not comparable." % arg) if arg == cls.zero: What do folks think? Best, Amit. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CANODV3k06002MN%2BjSssT%3Dx1MsbVaNnw9KvV-AkE6HAAkShx7Cg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.