[std::string --> String][Test] Pyconverter is updated with String change

python/tvm/relay/testing/py_converter.py

@@ -190,7 +190,7 @@ def convert_func_node(self, func: Function, name_var=None):
         if name_var is None:
             func_name = self.generate_function_name('_anon_func')
         if isinstance(name_var, GlobalVar):
-            func_name = name_var.name_hint
+            func_name = str(name_var.name_hint)
         if isinstance(name_var, Var):
             func_name = self.get_var_name(name_var)
 
@@ -411,7 +411,7 @@ def visit_var(self, var: Expr):
     def visit_global_var(self, gvar: Expr):
         # we don't need to add numbers to global var names because
         # the *names* are checked for uniqueness in the mod
-        return (Name(gvar.name_hint, Load()), [])
+        return (Name(str(gvar.name_hint), Load()), [])
 
 
     def visit_let(self, letexp: Expr):