您可以使用date该datetime模块查找一年中的第一个星期日，然后继续添加7天，生成新的星期日：
from datetime import date, timedelta
def allsundays(year):
d = date(year, 1, 1) # January 1st
d += timedelta(days = 6 - d.weekday()) # First Sunday
while d.year == year:
yield d
d += timedelta(days = 7)
for d in allsundays(2010):
print(d)
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