python - 替换重复的字符串字符

Question

我需要转换一个字符串 word，其中仅出现一次的每个字符应在新字符串中显示为 '('。原始字符串中的任何重复字符应替换为 ')'。

下面是我的代码...

def duplicate_encode(word):
new_word = ''
for char in word:
    if len(char) > 1:
        new_word += ')'
    else:
        new_word += '('
return new_word

我没有通过的测试如下:

'((((('应等于'()()()'

这表明，例如，如果输入是“recede”，则输出应为 ()()()。

Answer 1

你的代码很好，只需要一些修改就可以了。

def duplicate_encode(word):
    """
    To replace the duplicate letter with ")" in a string.
    if given letter is unique it replaced with "("
    """
    word_dict = {}   # initialize a dictionary
    new_word = "" 
    for i in set(word):   # this loop is used to count duplicate words
        word_count = word.count(i)
        word_dict[i] = word_count   # add letter and count of the letter to dictionary
    for i in word:
        if word_dict[i] > 1:
            new_word += ")"
        else:
            new_word += "("
    print new_word

duplicate_encode("recede")

我想你已经找到答案了:)