python-input数据类型转换

a = input('this is a :')
b = input('this is b :')
print('a+b=',a+b)

输入a=1，b=3

this is a :1
this is b :3
a+b= 13

python自动将输入类型定为string
然后我们修改代码

a = input('this is a :')
b = input('this is b :')
a = int(a)
b = int(b)
print('a+b=',a+b)

this is a :1
this is b :3
a+b= 4

此时结果正确显示