浙大Python 第3章-18 输出10个不重复的英文字母 (30 分)

原题题目

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代码实现

string = input();strl = len(string);ret = '';count = 0
for i in range(strl):
    if(count == 10): break
    if(('a'<=string[i]<='z' or 'A'<=string[i]<='Z') and string[i] not in (ret.upper() and ret.lower())):
        count+=1;ret+=string[i]
if(count <=9): print("not found")
else :print(ret)

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提交结果