def _progress(self, download_t, download_d, upload_t, upload_d):

        import sys
        uploaded = 0
        if upload_t:
            uploaded = upload_d * 100 / upload_t
        sys.stdout.write(chr(27) + '[2K' + chr(27)+'[G')
        sys.stdout.write("Uploaded: %.2f%%" % uploaded)
Override to implement custom error pages.
dataset/ETHPy150Open rmnl/clack/clack/account_client.py/API._progress--crossover with--dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/RequestHandler.write_error