近期,由于业务需要计算两个日期之前相差多少个月。我在网上找了很久,结果发现万能的 python,居然没有一个模块计算两个日期的月数,像 Java、C# 之类的高级语言,都会有 (date1-date2).months 的现成方法,觉得不可思议。说句实在的,一直觉得 python 的日期处理模块真心不好用。
哦,对了,别跟我说 datetime, calendar, dateutil 这些模块,因为我都试过了,都没用。有个竟然算出来还有错。datetime.timedelta 只能计算出日时分秒。对年月却不支持。网上一搜,一大堆的。
dateutil.rrule 这个例子是我好不容易找到的,请看我的测试结果:
- import datetime
- fromdateutilimport rrule
- d1 = datetime.date(2016, 2, 29)
- d2 = datetime.date(2019, 3, 31)
- months = rrule.rrule(rrule.MONTHLY, dtstart=d1, until=d2).count()
- print(f"months={months}")
看到这样的结果,我只能呵呵了。
废话不多少,献上自己写的代码:
该代码返回,(月, 小数月)
print(f"months={months}")
months = calmonths(d1, d2)
return holdmonths, decimalmonth
) * 12 + enddate.month - startdate.month
holdmonths = (enddate.year - startdate.year
else:
decimalmonth = (enddate - samemonthdate).days / currmonthdays
) * 12 + samemonthdate.month - startdate.month
holdmonths = (samemonthdate.year - startdate.year
currmonthdays = (nextmonthdate - samemonthdate).days
enddate.month + 1)[1])
enddate.year,
c.monthrange(
nextmonthdate = datetime.date(enddate.year, enddate.month + 1,
except Exception as e:
startdate.day)
nextmonthdate = datetime.date(enddate.year, enddate.month + 1,
try:
nextmonthdate = None
elif samemonthdate < enddate:
decimalmonth = (enddate - premanthdate).days / currmonthdays
) * 12 + premanthdate.month - startdate.month
holdmonths = (premanthdate.year - startdate.year
currmonthdays = (samemonthdate - premanthdate).days
enddate.month - 1)[1])
enddate.year,
c.monthrange(
premanthdate = datetime.date(enddate.year, enddate.month - 1,
print(e)
except Exception as e:
startdate.day)
premanthdate = datetime.date(enddate.year, enddate.month - 1,
try:
premanthdate = None
if samemonthdate > enddate:
decimalmonth = 0.0
holdmonths = 0
enddate.month)[1])
c.monthrange(enddate.year,
samemonthdate = datetime.date(enddate.year, enddate.month,
print(e)
except Exception as e:
startdate.day)
samemonthdate = datetime.date(enddate.year, enddate.month,
try:
samemonthdate = None
# 计算两个日期相隔月差
def calmonths(startdate, enddate):
d2 = datetime.date(2019, 3, 31)
d1 = datetime.date(2016, 2, 29)
import calendar as c
import datetime
欢迎各种暴力测试,有问题留言反馈。
来源: http://www.cnblogs.com/yicaifeitian/p/6895588.html