How to call a python function with a filename parameter

[Mark_L]

I have been given a python function whose parameter is a filename.  
How do deal with the filename when the file data type is not supported?

I believe this is a common use case.  Basically I just need to know how to call a python function with a filename parameter.

I have tried to use a string (see code example below), but to no avail.  

I get Error 1667 occurred at Python Node in MyString.vi->Call MyString.vi

Python code

--------------------

import math
import numpy as np
from pathlib import Path

def load_my_file(my_string):
"""Loads a file and returns the name."""

    filepath = Path(my_string)
    return my_string

From Help >>>>

Python Node Details

Supported Data Types

The Python Node supports a large number of data types. You can use this node to call the following data types:

• Numerics
• Arrays, including multi-dimensional arrays
• Strings
• Clusters
• Booleans

[rolfk]

LabVIEW node Path To String. That's it!

[Mark_L]

Thank you.  I will check that out.