目录1 .group函数1.1 返回整个匹配结果1.2 返回指定分组的匹配结果1.3 处理没有匹配结果的情况2. groups函数3. group和groups的使用场景在Pytjshon中，正则表达式的group和groups方法是非常有用的函数，用于处理匹配
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