+：“int”和“str”的操作数类型不受支持

Question

我现在正在学习Python，所以我不知道发生了什么。

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))

当我运行程序，输入num1、num2和num3的数字时，它返回： 回溯（最近一次呼叫时间）：

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

Answer 1

试试看

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

此语句将以string格式提供列表中的每个元素

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

而且

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

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

还有。

Answer 2

您试图连接字符串和整数，这是不正确的。

将print(numlist.pop(2)+" has been removed")更改为以下任何选项：

显式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")

字符串格式：

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