Python判断变量类型是否为List,str,int等内容

用法：isinstance(变量,list)

a = [1,2,3]
b = 123
c = "123"
print(type(a))

print(type(b))

print(type(c))


if isinstance(a,list):
    print("This is a List")

if isinstance(b,int):
    print("This is b int")

if isinstance(c,str):
    print("This is c str")

 

 

<class 'list'>
<class 'int'>
<class 'str'>
This is a List
This is b int
This is c str