Status: Accepted Owner: smichr Labels: Type-Defect Priority-Medium
New issue 1953 by smichr: inconsistency between "in" and "has" http://code.google.com/p/sympy/issues/detail?id=1953 There are inconsistent comparisons between quantities in __contains__ and .has().
eq = Symbol('x') xr = Symbol('x', real=1) xr in eq # calls __contains__ which uses "==" for test
True
eq.has(xr) # essentially uses xr in eq.atoms()
False This could be fixed by making __contains__ use "is" rather than "==". -- You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en.
