diff --git a/perfmetrics/scripts/testing_on_gke/examples/utils/gsheet.py b/perfmetrics/scripts/testing_on_gke/examples/utils/gsheet.py
index 0dabbdbb51..bd0ba6099f 100644
--- a/perfmetrics/scripts/testing_on_gke/examples/utils/gsheet.py
+++ b/perfmetrics/scripts/testing_on_gke/examples/utils/gsheet.py
@@ -91,41 +91,41 @@ def _using_local_service_key_file(localServiceAccountKeyFile: str):
     # Open a read-write gsheet client.
     client = _get_sheets_service_client(localServiceAccountKeyFile)
 
-  def _read_from_range(cell_range: str):
-    """Returns a list of list of values for the given range in the worksheet."""
-    gsheet_response = (
-        client.spreadsheets()
-        .values()
-        .get(spreadsheetId=gsheet_id, range=f'{worksheet}!{cell_range}')
-        .execute()
-    )
-    return gsheet_response['values'] if 'values' in gsheet_response else []
-
-  def _write_at_address(cell_address: str, data):
-    """Writes a list of tuple of values at the given cell_cell_address in the worksheet."""
-    client.spreadsheets().values().update(
-        spreadsheetId=gsheet_id,
-        valueInputOption='USER_ENTERED',
-        body={'majorDimension': 'ROWS', 'values': data},
-        range=f'{worksheet}!{cell_address}',
-    ).execute()
-
-  data_in_first_column = _read_from_range('A1:A')
-  num_rows = len(data_in_first_column)
-  data_in_first_row = _read_from_range('A1:1')
-  original_header = tuple(data_in_first_row[0]) if data_in_first_row else ()
-  new_header = data['header']
-
-  # Insert header in the file, if needed.
-  if not original_header or not original_header == new_header:
-    # Append header after last row.
-    _write_at_address(f'A{num_rows+1}', [new_header])
+    def _read_from_range(cell_range: str):
+      """Returns a list of list of values for the given range in the worksheet."""
+      gsheet_response = (
+          client.spreadsheets()
+          .values()
+          .get(spreadsheetId=gsheet_id, range=f'{worksheet}!{cell_range}')
+          .execute()
+      )
+      return gsheet_response['values'] if 'values' in gsheet_response else []
+
+    def _write_at_address(cell_address: str, data):
+      """Writes a list of tuple of values at the given cell_cell_address in the worksheet."""
+      client.spreadsheets().values().update(
+          spreadsheetId=gsheet_id,
+          valueInputOption='USER_ENTERED',
+          body={'majorDimension': 'ROWS', 'values': data},
+          range=f'{worksheet}!{cell_address}',
+      ).execute()
+
+    data_in_first_column = _read_from_range('A1:A')
+    num_rows = len(data_in_first_column)
+    data_in_first_row = _read_from_range('A1:1')
+    original_header = tuple(data_in_first_row[0]) if data_in_first_row else ()
+    new_header = data['header']
+
+    # Insert header in the file, if needed.
+    if not original_header or not original_header == new_header:
+      # Append header after last row.
+      _write_at_address(f'A{num_rows+1}', [new_header])
+      num_rows = num_rows + 1
+
+    # Append given values after the last row.
+    _write_at_address(f'A{num_rows+1}', data['values'])
     num_rows = num_rows + 1
 
-  # Append given values after the last row.
-  _write_at_address(f'A{num_rows+1}', data['values'])
-  num_rows = num_rows + 1
-
   if serviceAccountKeyFile.startswith('gs://'):
     localServiceAccountKeyFile = download_gcs_object_locally(
         serviceAccountKeyFile