read_sas catches own error #24548

pandas/io/sas/sasreader.py

@@ -16,8 +16,8 @@ def read_sas(filepath_or_buffer, format=None, index=None, encoding=None,
     filepath_or_buffer : string or file-like object
         Path to the SAS file.
     format : string {'xport', 'sas7bdat'} or None
-        If None, file format is inferred.  If 'xport' or 'sas7bdat',
-        uses the corresponding format.
+        If None, file format is inferred from file extension. If 'xport' or
+        'sas7bdat', uses the corresponding format.
     index : identifier of index column, defaults to None
         Identifier of column that should be used as index of the DataFrame.
     encoding : string, default is None
@@ -48,7 +48,7 @@ def read_sas(filepath_or_buffer, format=None, index=None, encoding=None,
             else:
                 raise ValueError("unable to infer format of SAS file")
         except ValueError:
-            pass
+            raise
 
     if format.lower() == 'xport':
         from pandas.io.sas.sas_xport import XportReader