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第一个问题：为什么会出现关于“非ASCII”的警告？要求我确定：- - 编码：cp1252 - - 第二个问题：代码下方的 KeyError 消息。
谢谢大家，非常，非常。我重视您的回答和建议

    ##Largest palindrome product Problem 4
##A palindromic number reads the same both ways. The largest palindrome made from the
##product of two 2-digit numbers is 9009 = 91 × 99.
##Find the largest palindrome made from the product of two 3-digit numbers.

    def is_palindrome(number):
return str(number) == str(number) [ : : -1]
    if __name__ == "__main__":
print ( " { } and {  } => {  } ".format(*max( (i, j, i*j )
                    for i in range(1000, 900, -1)
                        for j in range(1000, 900, -1)
                            if is_palindrome (i*j))))
##Traceback (most recent call last):
##  File "C:/Python27/Euler prob 4.py", line 11, in <module>
##    for i in range(1000, 900, -1)
##KeyError: ' '
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1 回答 1

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如果您在格式中放入某些内容，{}则会尝试将其用作键 - 即使它是空格

于 2013-06-25T23:31:58.440 回答