Update README.md

README.md

@@ -294,7 +294,14 @@ from datasets import load_dataset
 dataset = load_dataset("weiminhu/D-MIPLIB","CA-easy", split='test')
 test_id = 0
 test_instance = dataset[test_id]['MILP']
-ins_save_path = "./test_instance_%s.lp" % test_id
+
+# check file format
+file_format='lp'
+if 'format' in list(dataset[0].keys()):
+    if dataset[0]['format']=='mps':
+        file_format='mps'
+ins_save_path = "./test_instance_%s.%s" % (test_id,file_format)
+# write file to disk
 with open(ins_save_path, "w") as file:
     tmp=test_instance[2:-1]
     tmp=tmp.replace("\\n","\n")