Python:TypeError:无法连接“str"和“int"对象
问题描述
我有这个将字符串添加到整数的 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?
解决方案
有两种方法可以解决最后一个 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) 调用的结果分配给 c，如 @jamylak 正确显示的那样，然后连接所有字符串，或者您可以替换最后 print 简单地用这个:
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)
不是必须的，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
与:
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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