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challenge:2

差别

这里会显示出您选择的修订版和当前版本之间的差别。

到此差别页面的链接

challenge:2 [2017/03/31 05:29] (当前版本)
admin [解答]
行 1: 行 1:
 +====== Python Challenge 第二关:OCR ======
 +
 +===== 题目 =====
 +
 +<​code>​
 +<!--
 +find rare characters in the mess below:
 +-->
 +</​code>​
 +
 +在下面的字符中找出出现最少的字符:
 +
 +<​code>​
 +<!--
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 +}!)$]&​($)@](+(#​{$)_%^%_^^#​][{*[)%}+[##​(##​^{$}^]#&​(&​*{)%)&​][&​{]&#​]}[[^^&​[!#​}${@_(
 +#​@}&​$[[%]_&​$+)$!%{(}$^$}*
 +-->
 +</​code>​
 +
 +===== 解答 =====
 +其实只找出上面字符串中的a-z的字符就可以了。
 +
 +<code python>
 +import string
 +
 +a = """​ above string """​
 +if __name__ == "​__main__":​
 +  r = ""​
 +  for i in a:
 +    if i in string.letters:​
 +      r += i
 +  print r
 +</​code>​
 +
 +输出结果:;
 +<​code>​
 +equality
 +</​code>​
 +
 +也就是说下一关的入口为 equality.html
 +  * http://​www.pythonchallenge.com/​pc/​def/​equality.html
  
challenge/2.txt · 最后更改: 2017/03/31 05:29 由 admin