我想使用 for 循環(huán)獲取開始日期和結(jié)束日期之間范圍的唯一 yyyy-mm-01 列表。這是我的代碼：import datetimefrom datetime import timedelta, datestart=date(2017,4,1)end=(datetime.date.today().replace(day=1)) - datetime.timedelta(days=1) #last completed monthdef daterange(start, end): for n in range(int((end - start).days)): yield start + timedelta(n)for single_date in daterange(start, end): myset = str(single_date.strftime("%Y-%m-01")) print(myset)The issue is that my result looks like this:2017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-04-012017-05-01我嘗試添加 set() 但它仍然顯示冗余日期。我該如何解決？
4 回答
12345678_0001
TA貢獻(xiàn)1802條經(jīng)驗 獲得超5個贊
dates = set()
for single_date in daterange(start, end):
dates.add(single_date.strftime("%Y-%m-01"))
print(sorted(list(dates)))
夢里花落0921
TA貢獻(xiàn)1772條經(jīng)驗 獲得超6個贊
import datetime
from datetime import timedelta, date
from dateutil.relativedelta import relativedelta
start=date(2017,4,1)
end=(datetime.date.today().replace(day=1)) - datetime.timedelta(days=1) #last completed month
lst = []
current_date = start
while current_date < end:
current_date = current_date.replace(day=1) + relativedelta(months=1)
lst.append(current_date)
print(lst)
牧羊人nacy
TA貢獻(xiàn)1862條經(jīng)驗 獲得超7個贊
問題是你實(shí)際上并沒有使用你的集合來檢查你之前是否見過一個日期：
myset = set()
for single_date in daterange(start, end):
mydate = str(single_date.strftime("%Y-%m-01"))
if mydate not in myset:
print(mydate)
myset.add(mydate)
慕斯709654
TA貢獻(xiàn)1840條經(jīng)驗 獲得超5個贊
我強(qiáng)烈建議您使用dateutils模塊來獲取這樣的重復(fù)日期。您可以使用cmd安裝它pip install python-dateutil
>>> from dateutil.rrule import rrule, MONTHLY
>>>
>>> start=date(2017,4,1)
>>> end=(datetime.date.today().replace(day=1)) - datetime.timedelta(days=1)
>>> res = list(d.strftime("%Y-%m-%d") for d in rrule(dtstart=start, until=end, freq=MONTHLY))
>>> pprint(res)
['2017-04-01',
'2017-05-01',
'2017-06-01',
'2017-07-01',
'2017-08-01',
'2017-09-01',
'2017-10-01',
'2017-11-01',
'2017-12-01',
'2018-01-01',
'2018-02-01',
'2018-03-01',
'2018-04-01',
'2018-05-01',
'2018-06-01',
'2018-07-01',
'2018-08-01',
'2018-09-01',
'2018-10-01',
'2018-11-01',
'2018-12-01',
'2019-01-01',
'2019-02-01',
'2019-03-01',
'2019-04-01',
'2019-05-01',
'2019-06-01',
'2019-07-01',
'2019-08-01',
'2019-09-01',
'2019-10-01',
'2019-11-01',
'2019-12-01',
'2020-01-01',
'2020-02-01',
'2020-03-01',
'2020-04-01',
'2020-05-01',
'2020-06-01',
'2020-07-01']
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