类型错误：％d格式：需要数量，而不是str的

Question

我想使用的打印格式打印字符串和数字，我 有以下代码：

John = {'strength': 10, 'skill': 10} 
character1 = "John" 
strength = eval(character1)['strength'] 
skill = eval(character1)['skill'] 
print " %d " % eval(character1)['strength'] 
print " %d " % strength 
print "$s's strength is: %d, and $s's skill is: %d" % (character1, strength, character1, skill) 
print "$s's strength is: %d, and $s's skill is: %d" % character1, eval(character1)['strength'], character1, eval(character1)['skill'] 

前两个打印我没有错误，他们打印10，最后两个打印给我： “TypeError：％d格式：一个数字是必需的，而不是str”。

我不明白为什么，请给点意见，谢谢！

Answer 1

这是错误的：$s应该是%s。