Question

age = raw_input ('How old are you? ')
print "In two year's time you will be: " , age + 2

如何让此代码的最后一行有效？当我在Python中运行时，我收到错误TypeError: cannot concatenate 'str' and 'int' objects。

Answer 1

使用int强制str并使用str.format将其添加到您的字符串中：

age = int(raw_input ('How old are you? ')) 
print "In two year's time you will be: {}".format(age + 2)

Answer 2

我们可以通过将age转换为int并将其添加到int来连接它。

 age = raw_input ('How old are you? ')
 print "In two year's time you will be: " , int(age) + 2

事实上，更好的打印方法是使用格式：

print "In two year's time you will be: {}".format(int(age) + 2)

Answer 3

age = int(raw_input ('How old are you? '))
print "In two year's time you will be: " , age + 2

Answer 4

age = raw_input ('How old are you? ')
print "In two year's time you will be: " , str(int(age) + 2)

如果您使用的是Python 2.7，那么它应该可以工作，不确定它是否适用于3.x