# Output every line in the file that starts with '0'
out_file.writelines(line for line in input_file if line.startswith('0'))
-# Commit the output to keep. This returns a Keep id.
-output_id = out.finish()
+# Commit the output to Keep.
+output_locator = out.finish()
-# Set the output for this task to the Keep id
-this_task.set_output(output_id)
+# Use the resulting locator as the output for this task.
+this_task.set_output(output_locator)
# Done!