我正在嘗試使用 python 代碼將以下代碼片段中的字符值 'K' 替換為 'M'，但運(yùn)氣不佳。代碼：import reoriginal_text = 'context PQ-4662-33-K64C-C-DDxxx-Sxxxx'regex = re.compile(r'context\s.*\d[0-9]\-\w\w\-(K).*')result = re.match(regex, original_text)replace_attempt = regex.sub(r'M\1', original_text)print(result.group(0))print(result.group(1))print(replace_attempt)輸出：context PQ-4662-33-K64C-C-DDxxx-SxxxxKMKProcess finished with exit code 0我正在尋求的期望輸出：context PQ-4662-33-M64C-C-DDxxx-Sxxxx