more + to / for datapaths

proxtoolbox/experiments/ptychography/ptychographyExperiment.py

@@ -172,11 +172,11 @@ class PtychographyExperiment(Experiment):
 
         if self.datafile is not None:
             if self.data_dir is not None:
-                data_path = self.data_dir + self.datafile
+                data_path = self.data_dir/self.datafile
             else:
                 data_path = self.datafile
-            if not data_path.endswith('.mat'):
-                data_path += '.mat'
+            if not str(data_path).endswith('.mat'):
+                data_path = self.data_dir/(self.datafile + '.mat')
 
             if not os.path.isfile(data_path):
                 print('*************************************************************************')
@@ -224,14 +224,14 @@ class PtychographyExperiment(Experiment):
             if self.datafile == 'data_NTT_01_26210_192x192':
                 reconst_file = 'reconstruction_data_NTT_01_26210_192x192.mat'
                 if self.data_dir is not None:
-                    file_path = self.data_dir + reconst_file
+                    file_path = self.data_dir/reconst_file
                 else:
                     file_path = reconst_file
                 reconst_dict = loadMatFile(file_path)
                 QQ = reconst_dict['P']
                 pos_file = 'positions_NTT_01_26210.mat'
                 if self.data_dir is not None:
-                    file_path = self.data_dir + pos_file
+                    file_path = self.data_dir/pos_file
                 else:
                     file_path = pos_file
                 pos_dict = loadMatFile(file_path)