Upload glass.py

glass.py

@@ -159,6 +159,7 @@ class Glass(datasets.GeneratorBasedBuilder):
 	
 	def preprocess(self, data: pandas.DataFrame) -> pandas.DataFrame:
 		data.columns = _BASE_FEATURE_NAMES
+		print(data.head())
 
 		if self.config.name == "windows":
 			data = data.rename(columns={"glass_type", "is_windows_glass"})