Upload sonar.py

sonar.py

@@ -58,7 +58,7 @@ class Sonar(datasets.GeneratorBasedBuilder):
     
     def _generate_examples(self, filepath: str):
         data = pandas.read_csv(filepath, header=None)
-        data.columns = list(range(61))
+        data.columns = [str(i) for i in range(61)]
         data = self.preprocess(data, config=self.config.name)
 
         for row_id, row in data.iterrows():