为什么我不能在python中比较str和int

Question

这是我的密码：

name = input("What's your name? ")
print("Nice to meet you " + name + "!")
age = input("Your age? ")
print("So, you are already " + age + " years old, " + name + "!")
if age > 50:
    print ("you are to old thx ")
else:
    print ("nice age using your apportunity ")

这是我的错误结果：

What's your name? daffa
Nice to meet you daffa!
Your age? 12
So, you are already 12 years old, daffa!
Traceback (most recent call last):
   File "C:\Users\murtadho\AppData\Local\Programs\Python\Python37\x.py", line
6, in <module>
     if age > 50:
TypeError: '>' not supported between instances of 'str' and 'int'

这里发生了什么？你知道吗

Answer 1

试试这个：作为解决方案； 我已经更新了你的代码，考虑到年龄的类型只有一个整数

name = input("What's your name? ")
print("Nice to meet you " + name + "!")
while True:
    try:
        age = int(input("Your age? "))
        break
    except Exception as e:
        print("please enter a valid age")
print("So, you are already " + str(age) + " years old, " + name + "!")

if age > 50:
   print ("you are to old thx ")

else:
   print ("nice age using your apportunity ")