Use join for path concatenation

Author: BBB

src/py/label_dir.py

@@ -37,9 +37,9 @@
     #mkdir ('scanned')
 
     for image_file in img_files:
-        image_data =  tf.gfile.FastGFile(var_path+"/"+image_file, 'rb').read()
+        image_data =  tf.gfile.FastGFile(join(var_path, image_file), 'rb').read()
 
-        print (var_path+"/"+image_file)
+        print join(var_path, image_file)
         predictions = sess.run(softmax_tensor, \
                  {'DecodeJpeg/contents:0': image_data})
 
@@ -49,7 +49,7 @@
 
         new_file_name = label_lines[firstElt] +"--"+ str(predictions[0][firstElt])[2:7]+".jpg"
         print(new_file_name)
-        copyfile(var_path+"/"+image_file, dest_dir+"/"+new_file_name)
+        copyfile(join(var_path, image_file), join(dest_dir, new_file_name))
 
         for node_id in top_k:
             human_string = label_lines[node_id]