Python解析json字符串

通过仔细分析json的格式，json无外乎就是字典套列表，列表套字典，层层嵌套，因此我们可以通过递归来实现。

def analyze_json(jsons):
    """
    解析传进来的jsons,将jsons解析成key-value并输出
    :param jsons: 需要解析的json字符串
    :return:
    """
    key_value = ''
    # isinstance函数是Python的内部函数，他的作用是判断jsons这个参数是否为dict类型
    # 如果是的话返回True，否则返回False
    if isinstance(jsons, dict):
        for key in jsons.keys():
            key_value = jsons.get(key)
            if isinstance(key_value, dict):
                analyze_json(key_value)
            elif isinstance(key_value, list):
                for json_array in key_value:
                    analyze_json(json_array)
            else:
                print(str(key) + " = " + str(key_value))
    elif isinstance(jsons, list):
        for json_array in jsons:
            analyze_json(json_array)

def output_value(jsons, key):
    """
    通过参数key，在jsons中进行匹配并输出该key对应的value
    :param jsons: 需要解析的json串
    :param key: 需要查找的key
    :return:
    """
    key_value = ''
    if isinstance(jsons, dict):
        for json_result in jsons.values():
            if key in jsons.keys():
                key_value = jsons.get(key)
            else:
                output_value(json_result, key)
    elif isinstance(jsons, list):
        for json_array in jsons:
            output_value(json_array, key)
    if key_value!='':
        print(str(key)+" = "+str(key_value))

# 定义一个jsons1串
jsons1 = {"b":{"a":[{"n1":"WIFI","lo":116.30744414106923,"t2":"1387873418.195T+08:00","t3":"target_首页-海报视频点击",
                    "p1":"com.tudou.ui.activity.HomeActivity","n2":840,"la":39.98049465154441,"l":False},
                    {"n1":"WIFI","lo":116.30744414106923,"t2":"1387873415.880T+08:00","t1":"A1005","s1":
                    "5da19f89080af666bc2cb8d8775706df","p1":"com.tudou.ui.activity.HomeActivity"}]},
                    "h":{"i":{"o2":"4.3","o1":"Android","b2":"Nexus 7","m":"10:bf:48:c2:81:f5","h":1205,"w":
                    800,"u":"f835c7f8-c331-4b47-a6a3-772021544aa9","b1":"google"}}}
# 调用解析
print('将jsons1解析后的结果如下：')
analyze_json(jsons1)
# 调用查找
print('…………………………………………………………………………')
print('查找jsons1中t2key的value值如下')
output_value(jsons1, 't2')

执行以上代码后，结果如下：

可是有些时候，我们拿到的response中的value值为小写的‘false’‘true’，里面有"l":false，然后我们在解析这个response的时候就会报错

{"b":{"a":[{"n1":"WIFI","lo":116.30744414106923,"t2":"1387873418.195T+08:00","t3":"target_首页-海报视频点击","p1":"com.tudou.ui.activity.HomeActivity","n2":840,"la":39.98049465154441,"l":false},{"n1":"WIFI","lo":116.30744414106923,"t2":"1387873415.880T+08:00","t1":"A1005","s1":"5da19f89080af666bc2cb8d8775706df","p1":"com.tudou.ui.activity.HomeActivity"}]},"h":{"i":{"o2":"4.3","o1":"Android","b2":"Nexus 7","m":"10:bf:48:c2:81:f5","h":1205,"w":800,"u":"f835c7f8-c331-4b47-a6a3-772021544aa9","b1":"google"}}}

这时候我们可以通过import json来解决！！！！！！！！！！！！！！！！！！