Fixes for unicode handling in Python

src/ifcwrap/CMakeLists.txt

@@ -16,7 +16,7 @@ SET(CMAKE_SWIG_FLAGS "")
 
 SET_SOURCE_FILES_PROPERTIES(IfcPython.i PROPERTIES CPLUSPLUS ON)
 SWIG_ADD_MODULE(ifcopenshell_wrapper python IfcPython.i)
-SWIG_LINK_LIBRARIES(ifcopenshell_wrapper ${PYTHON_LIBRARIES} IfcParse IfcGeom TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO TKFillet TKOffset)
+SWIG_LINK_LIBRARIES(ifcopenshell_wrapper ${PYTHON_LIBRARIES} IfcParse IfcGeom TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO TKFillet TKOffset ${ICU_LIBRARIES})
 
 # To install IfcPython let's get the site-packages dir from python
 EXECUTE_PROCESS(COMMAND python -c "import sys; from distutils.sysconfig import get_python_lib; sys.stdout.write(get_python_lib())"

src/ifcwrap/utils/type_conversion.i

@@ -110,7 +110,7 @@
 	PyObject* pythonize(const unsigned int& t)          { return PyInt_FromLong(t);                                                                  }
 	PyObject* pythonize(const bool& t)                  { return PyBool_FromLong(t);                                                                 }
 	PyObject* pythonize(const double& t)                { return PyFloat_FromDouble(t);                                                              }
-	PyObject* pythonize(const std::string& t)           { return PyString_FromString(t.c_str());                                                     }
+	PyObject* pythonize(const std::string& t)           { return PyUnicode_FromString(t.c_str());                                                    }
 	PyObject* pythonize(const IfcUtil::IfcBaseClass* t) { return SWIG_NewPointerObj(SWIG_as_voidptr(t), SWIGTYPE_p_IfcParse__IfcLateBoundEntity, 0); }
 	// NB: This cannot be temporary as a Python object is constructed from a pointer to the address of this object
 	PyObject* pythonize(const IfcGeom::Material& t)     { return SWIG_NewPointerObj(SWIG_as_voidptr(&t), SWIGTYPE_p_IfcGeom__Material, 0);           }