fix(read_configuration_file): Add isinstance for optional inputs.

It is necessary to check if optional path inputs are Path if they are set to None by default, unlike the required inputs which can be converted to str without any isinstance

examples/susquehanna/run_simulation_mpas.py

@@ -1,8 +1,8 @@
 import os, sys
 from pathlib import Path
 
-from pyflowline.configuration.change_json_key_value import pyflowline_change_json_key_value
 from pyflowline.configuration.read_configuration_file import pyflowline_read_configuration_file
+from pyflowline.configuration.change_json_key_value import pyflowline_change_json_key_value
 from pyflowline.configuration import path_manager as pyflowline_path_manager
 
 #%% Define the case information (configuration file parameters)
@@ -103,7 +103,7 @@
     iCase_index_in=iCase_index, 
     sDate_in=sDate)
 
-# Check the model parameters
+#%% Check the model parameters
 oPyflowline.pyflowline_print()
 
 #%% Now we can change some model parameters

pyflowline/configuration/read_configuration_file.py

@@ -39,8 +39,10 @@ def pyflowline_read_configuration_file(
         _type_: _description_
     """
     # Ensure input filenames are strings
-    sFilename_configuration_in = str(sFilename_configuration_in)
-    sWorkspace_output_in = str(sWorkspace_output_in)
+    if isinstance(sFilename_configuration_in, Path):
+        sFilename_configuration_in = str(sFilename_configuration_in)
+    if isinstance(sWorkspace_output_in, Path):
+        sWorkspace_output_in = str(sWorkspace_output_in)
 
     if not os.path.isfile(sFilename_configuration_in):
         print(sFilename_configuration_in + ' does not exist')
@@ -120,8 +122,9 @@ def pyflowline_read_configuration_file(
         # try to create this output folder first using
 
     try:
-        print(sWorkspace_output)
+        print("Creating the specified output workspace (if it does not exist): \n", sWorkspace_output)
         Path(sWorkspace_output).mkdir(parents=True, exist_ok=True)
+        print("The specified output workspace is: \n", sWorkspace_output)
     except ValueError:
         print("The specified output workspace cannot be created!")
         exit