TypeError：'> ='在'int'和'str'的实例之间不支持

Question

[作为检查点测试的一部分，我正在创建自动售货机，但是我面临下面所述的重复出现的问题。

我正在使用Python 3.7.4

print("----WELCOME TO THE ABBEY GRANGE VENDING MACHINE----")
print("Please enter three coins")

first = input("Please enter your first coin: ")
first = int(first)

second = input("Please enter your second coin: ")
second = int(second)

third = input("Please enter your third coin: ")
third = int(third)

coin = int(first) + int(second) + int(third)
coin= int(coin)

if int(coin >= "15"):
    print("Thank you! You have inserted", money,"pence")
else:
    print("You have not inserted enough coins. You may not purchase anything at this time!")`
    print("Goodbye")`

代码继续出现相同的问题：

print("Or we can pick something for you but you must have over 65p")

if money > "65":
    choice = input("Would you like a generated option? ")
    if choice == "Yes":
       print (menu)

如果用户输入的第一个数字大于10，则输入10、10、10，我希望代码继续执行，但我得到：

Traceback (most recent call last):
  File "C:\Users\dell\Downloads\Abbey Grange Vending Machine.py", line 21, in <module>
    if int(coin >= "15"):
TypeError: '>=' not supported between instances of 'int' and 'str'

Answer 1

除了您的错误外，您的代码还有很多其他问题。首先，对于您的情况，您无法在不同数据类型int和str的两个变量之间执行逻辑运算/比较。您也将money variable传递给print函数，但未在代码中的任何地方定义它。以下代码可解决您的问题

print("----WELCOME TO THE ABBEY GRANGE VENDING MACHINE----")
print("Please enter three coins")

first = input("Please enter your first coin: ")
first = int(first)

second = input("Please enter your second coin: ")
second = int(second)

third = input("Please enter your third coin: ")
third = int(third)

coin = first + second + third

if (coin >= 15):
    print(f"Thank you! You have inserted, {coin} pence")
else:
    print("You have not inserted enough coins. You may not purchase anything at this time!")
    print("Goodbye")