TypeError：％d format：需要一个数字，而不是str

Question

我想用打印格式打印字符串和数字，我想 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： ＆＃34; TypeError：％d格式：需要一个数字，而不是str＆＃34;。

我不明白为什么，请指点一下，谢谢！

Answer 1

这是错误：$s应为%s。