比如：
計算過去兩年/一年/半年/三個月/乙個月內的資料量計算合同預計簽署日期在未來一年內的資料量
def
past24mons
(time)
: time = time.replace(
'-','')
past24ago =
'{}{}'
.format
(int
(datetime.datetime.now(
).strftime(
'%y%m%d')[
:4])
-2, datetime.datetime.now(
).strftime(
'%m%d'))
return time >= past24ago
def
past12mons
(time)
: time = time.replace(
'-','')
past12ago =
'{}{}'
.format
(int
(datetime.datetime.now(
).strftime(
'%y%m%d')[
:4])
-1, datetime.datetime.now(
).strftime(
'%m%d'))
return time >= past12ago
def
one_year_ago
(time)
: date =
for i in time:
tmp =
str(
int(i[:4
])-1
)+ i[4:
] date[i]
= tmp
return date
from datetime import datetime,timedelta
from dateutil.relativedelta import relativedelta
def
past6mon
(time)
: time = time.replace(
'-','')
past6ago = datetime.date.today(
)- datetime.timedelta(days=
180)
past6ago = past6ago.strftime(
'%y%m%d'
)return time >= past6ago
defpast1mon
(time)
: time = time.replace(
'-','')
past1ago = datetime.date.today(
)- datetime.timedelta(days=30)
past1ago = past1ago.strftime(
'%y%m%d'
)return time >= past1ago
# 獲得當前時間
now_time = datetime.now(
)print
(now_time,
"當前時間"
)# 方法一
defchange_time
(time_str, days=
0, hours=
0, minutes=0)
:iftype
(time_str)
==str
: time_str = datetime.strptime(time_str,
'%y-%m-%d %h:%m:%s'
) ret = time_str + timedelta(days=days, hours=hours, minutes=minutes)
return ret
# 7天後
ret1 = change_time(now_time, days=7)
print
(ret1,
"7天後"
)# 方法二
defdelay_time
(time_str, years=
0, months=
0, days=
0, hours=
0, minutes=
0, seconds=0)
:iftype
(time_str)
==str
: time_str = datetime.strptime(time_str,
'%y-%m-%d %h:%m:%s'
) ret = time_str + relativedelta(years=years, months=months, days=days, hours=hours, minutes=minutes, seconds=seconds)
return ret
# 1個月前
ret2 = delay_time(now_time, months=-1
)print
(ret2,
'乙個月前'
)# 注意: relativedelta 還有一種用法
ret3 = now_time + relativedelta(day=10)
# 注意這裡是day, 上邊是days
print
(ret3)
# 此時獲得的時間是10號的, 也就是上邊的day是幾他就是幾號,
# 有意思的是, 你是平年2月傳乙個31, 得到的結果是28
2020-12
-2516:
08:15.946219 當前時間
2021-01
-0116:
08:15.946219
7天後2020-11
-2516:
08:15.946219 乙個月前
2020-12
-1016:
08:15.946219
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