python - 创建并返回具有连续重复字母的所有国家/地区的元组

Question

def get_doubled_letter_countries()
This function creates and returns a tuple of all the countries that have consecutive repeated letters. When called it returns that tuple, in alphabetical order by the doubled letters:
('morocco', 'greece', 'marshall islands', 'seychelles', 'cameroon', 'philippines', 'andorra', 'sierra leone', 'guinea-bissau', 'russia', 'saint kitts and nevis')
Notice they are in alphabetical order by the doubled letters: c, e, l, l, o, p, r, r, s, s, t

这是我的代码:

def get_doubled_letter_countries(double_letter_list):
    """"
    This function creates and returns a tuple of all the countries that have consecutive repeated letters.
    When called it returns that tuple, in alphabetical order by the doubled letters:
    """
    double_letter = re.compile(r'.*(.)\1.*', re.IGNORECASE)
    double_letter_list = []
    for countrie in countries:
        for word in countrie.split(" "):
            match = double_letter.match(word)
            if match:
                double_letter_list.sort()
                double_letter_list.append(match.group())
    print(tuple(double_letter_list))

它打印这个:(“安道尔”、“喀麦隆”、“希腊”、“几内亚比绍”、“基茨”、“编码(marshal)”、“摩洛哥”、“菲律宾”、“俄罗斯”、“塞舌尔”、“塞拉利昂”)

我需要它来打印:('摩洛哥', '希腊', '马绍尔群岛', '塞舌尔', '喀麦隆', '菲律宾', '安道尔', '塞拉利昂', '几内亚比绍', '俄罗斯', '圣基茨和尼维斯')

Answer 1

您的 regex 语句与您要实现的目标不匹配。

从捕获组的任一侧删除 .*。

(.)\1

考虑到按连续字母排序的要求，我们可以将国家和匹配的正则表达式存储在元组列表中。然后我们可以使用 sorted() 和 lambda 对匹配的元素进行排序。

---

countries= ('morocco', 'greece', 'marshall islands', 'seychelles', 'cameroon', 'philippines', 'andorra', 'sierra leone', 'guinea-bissau', 'russia', 'saint kitts and nevis')

def sorted_doubles(countries):

    result = []
    pattern = re.compile(r'(.)\1', re.IGNORECASE)

    for c in countries:
        match = pattern.search(c)
        if match:
            result.append((c, match.group(0)))

    sorted_r = sorted(result, key=lambda x: x[1])

    return tuple([country for country, _ in sorted_r])

print(sorted_doubles(countries))
#('morocco', 'greece', 'marshall islands', 'seychelles', 'cameroon', 'philippines', 'andorra', 'sierra leone', 'guinea-bissau', 'russia', 'saint kitts and nevis')