Update app.py

app.py

@@ -205,7 +205,7 @@ def choose_best_sheet_and_header(xl:  pd.ExcelFile, max_header_rows: int = 30):
 
 def dataframe_from_upload_bytes(filename: str, data: bytes) -> pd.DataFrame:
     ext = Path(filename).suffix.lower()
-    if ext in [". xlsx", ".xls", ".xlsm", ". ods"]:
+    if ext in [".xlsx", ".xls", ".xlsm", ". ods"]:
         xl = pd.ExcelFile(io.BytesIO(data))
         best = choose_best_sheet_and_header(xl)
         return best["df"]