Python：如何从日期列表中计算日期范围？

我有一个日期列表,例如：

['2011-02-27','2011-02-28','2011-03-01','2011-04-12','2011-04-13','2011-06-08']

如何查找这些日期中包含的连续日期范围？在上面的示例中,范围应为：

[{"start_date": '2011-02-27',"end_date": '2011-03-01'},{"start_date": '2011-04-12',"end_date": '2011-04-13'},{"start_date": '2011-06-08',"end_date": '2011-06-08'}
]

谢谢.

解决方法

这是有效的,但我对此不满意,将采用更清洁的解决方案来编辑​​答案.完成,这是一个干净,有效的解决方案：

import datetime
import pprint

def parse(date):
    return datetime.date(*[int(i) for i in d.split('-')])

def get_ranges(dates):
    while dates:
        end = 1
        try:
            while dates[end] - dates[end - 1] == datetime.timedelta(days=1):
                end += 1
        except IndexError:
            pass

        yield {
            'start-date': dates[0],'end-date': dates[end-1]
        }
        dates = dates[end:]

dates = [
    '2011-02-27','2011-06-08'
]

# Parse each date and convert it to a date object. Also ensure the dates
# are sorted,you can remove 'sorted' if you don't need it
dates = sorted([parse(d) for d in dates]) 

pprint.pprint(list(get_ranges(dates)))

而相对输出：

[{'end-date': datetime.date(2011,3,1),'start-date': datetime.date(2011,2,27)},{'end-date': datetime.date(2011,4,13),12)},6,8),8)}]