close #561 (#562)

* fix set conversion

* version bump

Author: jverzani

Project.toml

@@ -1,6 +1,6 @@
 name = "SymPy"
 uuid = "24249f21-da20-56a4-8eb1-6a02cf4ae2e6"
-version = "2.3.2"
+version = "2.3.3"
 
 [deps]
 CommonEq = "3709ef60-1bee-4518-9f2f-acd86f176c50"

src/python_connection.jl

@@ -46,10 +46,12 @@ SymPyCore.:↓(x::Set)  = _sympy_.sets.FiniteSet((↓(xi) for xi ∈ x)...)
 SymPyCore.:↑(::Type{<:AbstractString}, x) = Sym(PyObject(x))
 SymPyCore.:↑(::Type{<:Bool}, x) = Sym(x)
 
-function SymPyCore.:↑(::Type{PyCall.PyObject}, x)
+_Set(x) = Set(x)
+_Set(xs...) = Set(xs)
+function SymPyCore.:↑(u::Type{PyCall.PyObject}, x)
     # check if container type
     # pybuiltin("set") allocates, as PyObject does
-    pyisinstance(x, _pyset_)   && return Set(collect(Sym, x))
+    pyisinstance(x, _pyset_)   && return _Set(collect(map(Sym, x))...)
     pyisinstance(x, _pytuple_) && return Tuple(↑(xᵢ) for xᵢ ∈ x)
     pyisinstance(x, _pylist_)  && return [↑(xᵢ) for xᵢ ∈ x]
     pyisinstance(x, _pydict_)  && return Dict(↑(k) => ↑(x[k]) for k ∈ x)