Fix regex for dataset search

trainers/base.py

@@ -45,7 +45,7 @@ class BaseTrainer():
         pwd = __exec('pwd')[0]
         path = f"{pwd}/{self.data_path}"
 
-        for file in __exec(f"find -L {self.data_path} -regex '^.*dataset[_0-9]*\(_auto_split\)*.csv'"):
+        for file in __exec(f"find -L {self.data_path} -regex '^.*dataset[-_0-9]*\(_auto_split\)*.csv'"):
             file_name = file.split("/")[-1][:-4]
             args = {
                 "executionType": task,