不支持的操作数types为+：'int'和'str'

我目前正在学习Python，所以我不知道发生了什么事情。

num1 = int(input("What is your first number? ")) num2 = int(input("What is your second number? ")) num3 = int(input("What is your third number? ")) numlist = [num1, num2, num3] print(numlist) print("Now I will remove the 3rd number") print(numlist.pop(2) + " has been removed") print("The list now looks like " + str(numlist)) 

当我运行该程序时，inputnum1，num2和num3的数字，它将返回：Traceback（最近一次调用的最后一个）：

 TypeError: unsupported operand type(s) for +: 'int' and 'str' 

Answer 1

你试图连接一个string和一个整数，这是不正确的。

将print(numlist.pop(2)+" has been removed")更改为以下任一项：

显式的int到str转换：

 print(str(numlist.pop(2)) + " has been removed") 

使用,而不是+ ：

 print(numlist.pop(2), "has been removed") 

string格式：

 print("{} has been removed".format(numlist.pop(2))) 

Answer 2

尝试，

str_list = " ".join([str(ele) for ele in numlist])

这个语句将以string格式给你列表的每个元素

print("The list now looks like [{0}]".format(str_list))

和，

更改print(numlist.pop(2)+" has been removed")

print("{0} has been removed".format(numlist.pop(2)))

以及。