Python：TypeError：无法连接'str'和'int'对象 [英] Python: TypeError: cannot concatenate 'str' and 'int' objects

问题描述

我有这个为整数添加字符串的python程序：

I have this python program that adds strings to integers:

a = raw_input("Enter a: ")
b = raw_input("Enter b: ")
print "a + b as strings: " + a + b
a = int(a)
b = int(b)
c = a + b
str(c)
print "a + b as integers: " + c

我收到此错误：

Python: TypeError: cannot concatenate 'str' and 'int' objects

如何将字符串添加到整数？

How can I add strings to integers?

推荐答案

有两种方法可以解决由上一个 print 语句引起的问题。

There are two ways to fix the problem which is caused by the last print statement.

您可以将 str（c）的结果分配给 c 正如@jamylak正确显示然后连接所有字符串，或者您可以使用以下内容替换最后的 print ：

You can assign the result of the str(c) call to c as correctly shown by @jamylak and then concatenate all of the strings, or you can replace the last print simply with this:

print "a + b as integers: ", c  # note the comma here

在这种情况下

str(c)

不是必需的，可以删除。

isn't necessary and can be deleted.

样本运行的输出：

Enter a: 3
Enter b: 7
a + b as strings:  37
a + b as integers:  10

with：

a = raw_input("Enter a: ")
b = raw_input("Enter b: ")
print "a + b as strings: " + a + b  # + everywhere is ok since all are strings
a = int(a)
b = int(b)
c = a + b
print "a + b as integers: ", c

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