在python中使用递归函数和结构类型?

type() 或 isinstance() 决定做什么。

def handle(x):
    if isinstance(x, dict):
        # do dict stuff
        for key, val in x.items():
            handle(val)
    elif isinstance(x, list):
        # do list stuff
        for val in x:
            handle(val)
    elif isinstance(x, str):
        # do string stuff
        print(x)
    elif isinstance(x, (int, float)):
        # maybe integer, float, etc
        print(x)
    else:
        print("None???")

d = json.loads(json_string)

handle(d)

array in array , dict in array 等等

isinstance

s='this is a string (str)'
if isinstance(s,str):
    do something

还可以进行多种操作,如:

isinstance(s,(str,int))

type :

if type(s) is str:
    do something

可以使用多个,如:

type(s) in (str,int)

但在这些解决方案中,我建议使用 存在