def _make_data(self, approximate_length):
        fragments = []
        so_far = 0
        while so_far < approximate_length:
            fragment = ('%d:' % so_far).encode('utf-8')
            so_far += len(fragment)
            fragments.append(fragment)
        return six.b('').join(fragments)
Generate a sequence of bytes to use in testing an upload.
dataset/ETHPy150Open Backblaze/B2_Command_Line_Tool/test/test_bucket.py/TestUpload._make_data