如何在python中获取从给定年份到当前日期的季度周期

Question

我正在尝试获取从给定期间到当前日期的季度期间。我想要的是本年度的上一个季度，例如2021K4，而不是本季度。以下是我用来获取它的代码。

import datetime
import json
from_year = 2018
last_year = datetime.datetime.now().year
year_list = list(range(from_year, last_year))
period = []
for all_year in year_list:
all_months = [str(all_year)+'K'+str(i) for i in list(range(1,5))]
period = period + all_months
quarter = json.dumps(period)
print(quarter)

输出-["2018K1"，"2018K2"，"2018 K3"，"201K4"，"2019K1"，"2019K2"，"2019 K3"，"2020K1"，"202 K2"，"2020 K3"，"2021 K4"]

期望输出-["2018K1"，"2018K2"，"2018 K3"，"201K4"，"2019K1"，"2019K2"，"2019 K3"，"2020K1"，"2020 K2"，"2021K1〃]

Answer 1

问题是在定义year_list 时

尝试这样做：

import datetime
import json
from_year = 2018
current_year = datetime.datetime.now().year
current_month = int(datetime.datetime.now().strftime("%m"))
year_list = list(range(from_year, current_year+1))
period = []
for all_year in year_list:
if all_year != current_year:
all_months = [str(all_year)+'K'+str(i) for i in list(range(1,5))]
period += all_months        
else:
for q in range (1,((current_month-1)//3+1)):
period.append(str(current_year)+'K'+str(q))
quarter = json.dumps(period)
print(quarter)