求教：基于Python找到文本文档中特定的内容

Question

现在有个文本文档result.txt,其内容如下：
"examId":79284,"examQuestionId":6442687}},{"id":6442688,"extra":{},"examId":79284,"schoolId":24,"questionType":1,"rootId":6442680,"examId":79284,"examQuestionId":6442688}},{"id":6442689,"extra":{},"examId":79284,"schoolId":24,"questionType":2,"rootId":6442681

现在我要找出来questionType后面的1和2这种数字，实际情况下可能还会有3,4等等
我知道能用re来做，但具体的没什么头绪，有人能指导下吗

Answer 1

 一个是正则表达式
(?<=questionType\"\:\)d+
一个是当作json解析