如何从开始日期和结束日期列表中识别缺失的天数？

有点冗长，但你明白了

编辑：清理了一下

from datetime import date, timedelta

dates = [('2011-01-01', '2011-01-14'), ('2011-01-15','2011-01-31'), 
         ('2011-02-01', '2011-02-14'), ('2011-03-01', '2011-03-14'), 
         ('2011-03-16', '2011-03-31')]

def d_range(d1,d2):
    delta = d2 - d1 #assumes second date is always after first
    return [d1 + timedelta(days=i) for i in range(delta.days + 1)]

my_days = []

#calc the date range between each tuple
for d in dates:

    d1 = datetime.strptime(d[0],'%Y-%m-%d')
    d2 = datetime.strptime(d[1],'%Y-%m-%d')

    my_days.extend(d_range(d1,d2))


#now do the same for the max and min dates
my_range = d_range(min(my_days), max(my_days))


missing_dates = set(my_range).difference(set(my_days))

并解决您的评论：

missing_dates_list = list(missing_dates)

或回到他们的原始格式：

missing_dates_str =  [datetime.strftime(date, '%Y-%m-%d') for date in missing_dates]