如何用python来提取一个字符串中的key和value。

有一段字符串，目的想把字符串中的某些子串作为键值，某些子串作为值
字符串

adprod_type^B6^Apr_flag^B0^Asource^B^Asource_id^B^Aadprod_params^Bheight^D^Chtml^Ddfasfasdf^Cwidth^D^Aadprodset_id^B42401^Aadserve^B

最后想要的结果是

adprod_type: '6',pr_flag:'0', source:'', source_id:'', adprod_params:{height:'',html:'dfasfasdf',width:''}

def dividing(file_name):
    result = {}
    all_lines = open(file_name).readlines()
    for line in all_lines:
        data = {}
        a = line.split('')
        if len(a) <= 1:
            adprodset_code = line.strip()
            continue
        for i in a:
            b = i.split('')
            data[b[0]] = b[1]
        if len(data) != 0 and data['adprod_type'] == '6':

            subdata = data['adprod_params']
            c = subdata.split('')
            params = {}
            for j in c:
                d = j.split('')
                params[d[0]] = d[1]
            result[adprodset_code.strip('\n')] = {'params': params}
    return result

把*B替换为: '
把 *A替换为',

用字符串替换：'需要替换的字符串'.replace('B'，'').replace('A', ',')
正则替换：re.sub('B'，'', '‘需要替换的字符串’)

用链式替换就好了

str1= "adprod_type^B6^Apr_flag^B0^Asource^B^Asource_id^B^Aadprod_params^Bheight^D^Chtml^Ddfasfasdf^Cwidth^D^Aadprodset_id^B42401^Aadserve^B"
print(str1.replace("^Bheight",':{height').replace("adprodset_id","},adprodset_id").replace("^D",":'").replace("^C","',").replace("^B",":'").replace("^A","',"))

替换结果:adprod_type:'6',pr_flag:'0',source:'',source_id:'',adprod_params:{height:'',html:'dfasfasdf',width:'',},adprodset_id:'42401',adserve:'