user warnings update

psymple/build/abstract.py

@@ -83,8 +83,8 @@ def _check_existing_port_names(self, port: Port):
             return False
         elif port.name in self.parsing_locals:
             warnings.warn(
-                f"Attempted to create port with name '{port.name}', but this is already defined "
-                f"in the parsing_locals dictionary {self.parsing_locals}. Port will not be created."
+                f"The parameter '{port.name}' has been specified as a system parameter. " 
+                f"A port for '{port.name}' will not be created in '{self.name}'."
             )
             return False
         else:

psymple/build/system.py

@@ -134,10 +134,13 @@ def add_system_parameter(
                 assert all([isinstance(s, str) for s in signature])
                 assert set(signature) == set(sym_signature)
             else:
-                warnings.warn(
-                    f"A signature for function {name} was not provided. The appearance of "
-                    f"the function in displayed expressions may not be as expected."
-                )
+                try:
+                    value = float(function)
+                except:
+                    warnings.warn(
+                        f"A signature for function {name} was not provided. The appearance of "
+                        f"the function in displayed expressions may not be as expected."
+                    )
                 signature = sym_signature
             self._check_are_system_parameters(*signature)
             sym_func = self._add_symbolic_function(name, function, signature)