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Python处理日期方法大全、三十种方法

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发表于 2024-3-22 11:30 |只看该作者 |倒序浏览
|招呼Ta 关注Ta
使用 time 模块展示当前日期和时间$ l) f1 ]( q7 ^4 [% R' d! s/ j) \
import time
/ W) I( ?* f% j, z5 tfrom time import gmtime, strftime* A' x# T7 l% B- d; M! A
7 z0 H  I. K! \" H0 ]0 L" m
t = time.localtime()  
- x: z4 L  W4 `7 ?7 J8 vprint (time.asctime(t))  # Sun May 7 09:30:37 20172 c" G" C( D  \/ K) N: a( J1 f
print(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()))  # Sun, 07 May 2017 04:00:37 +0000
& M  U( \1 ]" _  t. P8 l3 T; ]3 {print(strftime("%A", gmtime()))  # Sunday$ U1 F& Y9 G8 f" U5 v' w7 F6 a
print(strftime("%D", gmtime()))  # 05/07/17
& Q; {. |1 s* _5 D/ w0 W4 O7 oprint(strftime("%B", gmtime()))  # May  G/ h0 l) y# E2 D' y  {# w1 x' }& t
print(strftime("%y", gmtime()))  # 17
# Y  Q9 A# f! e, E2 e5 G8 n0 Z1 N2 F7 d8 U
# Convert seconds into GMT date
* x/ S( L* o9 N  fprint(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime(1234567890)))  # Fri, 13 Feb 2009 23:31:30 +0000$ ^1 z* K# U7 G: F3 }

. E$ D! J: {1 o( _二、将天、小时、分钟转换为秒
. {2 h, u; n# `- V$ }SECONDS_PER_MINUTE = 60" `* x4 O3 r0 [1 Z+ X
SECONDS_PER_HOUR = 3600
! e6 B, V$ H% W( J8 ISECONDS_PER_DAY = 86400
/ J) {) |1 O6 ~9 ^: T/ T, U
9 N: T, s0 l7 M' Y1 V6 w# 输入天、小时、分钟、秒的数量
  n5 j5 R6 X8 |6 b9 H, r# z2 udays = int(input("Enter number of Days: "))
: X! d4 u: b% H# l* N$ V! @: ?: t. Ohours = int(input("Enter number of Hours: "))! X( ^2 K) X; ?; m
minutes = int(input("Enter number of Minutes: ")). c: v' H# t+ A* o$ k1 m
seconds = int(input("Enter number of Seconds: "))
/ w+ R  b9 @7 L  Z
* G  G. Z6 K5 ]/ J$ U# 计算
' y& t- d+ r5 ?8 z" ^4 k" ptotal_seconds = days * SECONDS_PER_DAY
( N, d2 j- y; R% Z& Q2 [. W/ s5 Y7 @total_seconds = total_seconds + ( hours * SECONDS_PER_HOUR)7 L4 J2 C1 l# x: M1 R
total_seconds = total_seconds + ( minutes * SECONDS_PER_MINUTE)
- h: a% z# m& b' i( U7 Ztotal_seconds = total_seconds + seconds
6 l( ~2 w2 V. O$ f( O0 y: j! J
) ]! j* B. E9 p, t% W! V# 结果* q% z& d. L- p# D; ^
print("Total number of seconds: ","%d"%(total_seconds))
! Q5 t1 [7 F# t" R. h6 Q5 R% ^, R'''/ k2 J# A2 D( e! g
Enter number of Days: 58 z  i6 Y9 y" {) P6 Y
Enter number of Hours: 36& J9 N5 l& T. s* f2 @4 V$ G& h
Enter number of Minutes: 24
& ?1 ]9 p8 N6 Y, `Enter number of Seconds: 15/ z1 M. r7 b3 Y0 z
Total number of seconds: 563055: T. A- y! ~" C1 `
'''
/ U( a6 W/ v, o# N! J/ t1 Z% d: H. a' ~+ `8 y
三、使用 Pandas 获取当前日期和时间
2 ?# j. X) R2 G* l$ a' N% Yimport pandas as pd
# O  P% j, U+ T9 @print(pd.datetime.now())  # 2018-01-19 16:08:28.393553
# b2 a1 Y$ S) Iprint(pd.datetime.now().date())  # 2018-01-19
. ~" s, }3 B9 pprint(pd.datetime.now().year)  # 2018
5 d- @, s& W$ U7 _4 N$ _9 Nprint(pd.datetime.now().month)  # 1
& r" q1 t2 j) y& d. `. n' Y/ _print(pd.datetime.now().day)  # 19& g$ j) Y4 o0 V( _( M' b+ Z
print(pd.datetime.now().hour)  # 16$ |  g2 E: e% {; e7 R
print(pd.datetime.now().minute)  # 8) W( |* n, W6 ~" ?! J
print(pd.datetime.now().second)  # 28
4 ?/ j: A- q/ n6 q4 \print(pd.datetime.now().microsecond)  # 394553
2 o! q) g. c1 l$ ]9 _' }
4 F: e2 c$ i+ k& [  `/ y四、将字符串转换为日期时间对象8 Y% r. Y5 b# U1 x8 e: o
from datetime import datetime
0 ^1 [& n& B6 S. \from dateutil import parser9 e7 X5 p, O+ z- _( a: G0 t1 u2 {
' o* C( W. t5 o6 F' u6 ]
d1 = "Jan 7 2015  1:15PM"
& f' W9 {" N6 Ed2 = "2015 Jan 7  1:33PM"
2 ?) `+ H$ u- C, ?& i( l3 I1 {# ^4 g1 `
# If you know date format9 K' Z7 W1 k  ?1 C( G' B0 ]
date1 = datetime.strptime(d1, '%b %d %Y %I:%M%p')
" V$ A! s* i( F1 d, V4 H( R# Cprint(type(date1))  # class 'datetime.datetime'# Z' ?3 q. u1 S8 P, X) v* Y
print(date1)  # 2015-01-07 13:15:00) r8 m4 ~' W  K) p5 B( v

- k5 ^& j8 s5 ?1 P9 y5 B# If you don't know date format
) _! w; H7 I( C) K( adate2 = parser.parse(d2)
  X  V" ?; W  N! [# C! z& Y! fprint(type(date2))  # class 'datetime.datetime'
, J, q8 l) U- d: J+ rprint(date2)  # 2015-01-07 13:33:00- L0 W: s& `/ N9 C5 G! q! A3 g

; \! @6 L' _! j. v1 f五、以毫秒为单位获取当前时间1 x0 L& L/ ~) T4 L" G5 ~0 |" p
import time, A( M3 a/ j+ x/ Z) Q' ^' L2 N3 o

1 ?# m6 m8 s+ N! }* ~milliseconds = int(round(time.time() * 1000))6 g. Z9 R- I$ n; f) Y9 T( A9 _
print(milliseconds)  # 1516364270650
9 P& y* f- O1 D, V3 D
8 L; K. j# M" k- Z1 X$ p: ]六、以 MST、EST、UTC、GMT 和 HST 获取当前日期时间5 `2 i0 |  M, a0 z
from datetime import datetime
. u! r" z( Y" Cfrom pytz import timezone0 [2 M9 x1 g6 p! B" M( }* H' M
  p8 J6 o, s- t8 O! p* a. `
mst = timezone('MST')+ Y% Y2 f2 @& Z0 o  m6 w: |- s5 f
print("Time in MST:", datetime.now(mst))  # Time in MST: 2017-01-19 06:06:14.495605-07:00
; A$ v2 V" M" Lest = timezone('EST')
( p1 Y0 @# R  X) V; Uprint("Time in EST:", datetime.now(est))  # Time in EST: 2017-01-19 08:06:14.496606-05:00
) |$ P# B# t$ A. @' {/ xutc = timezone('UTC')- |/ V" W1 T1 z6 q3 G+ G( w
print("Time in UTC:", datetime.now(utc))  # Time in UTC: 2017-01-19 13:06:14.496606+00:00
: _4 S% {) T" c6 W( U0 b- {: jgmt = timezone('GMT')
$ `5 z% l  F( i; f' Iprint("Time in GMT:", datetime.now(gmt))  # Time in GMT: 2017-01-19 13:06:14.496606+00:00
- L7 ~$ |+ P7 p! q4 Q2 ohst = timezone('HST')
3 K0 g' J: x9 {) Cprint("Time in HST:", datetime.now(hst))  # Time in HST: 2017-01-19 03:06:14.497606-10:00/ n5 w4 W1 H+ S  p
" `8 L1 u+ z( f% n
七、从给定的日期当中获取星期几
: I2 N! x6 \( |- O8 x: \1 v/ Timport datetime
5 }, d" n& x( R7 d$ n) w7 c; ]
5 L6 @7 P; t( L  E; ?: Y0 L8 Mdayofweek = datetime.date(2010, 6, 16).strftime("%A")8 L$ n" U% T0 \* n* U
print(dayofweek)  # Wednesday
4 U& I3 S# B! w, C# \$ X0 n# l! r$ }
; J! ?' f$ R7 X6 C, o6 S# weekday()方法: 0代表周一,6代表周日
2 P0 `4 G- k4 v7 H2 g  B6 q$ }. Zprint("weekday():", datetime.date(2010, 6, 16).weekday())  # weekday(): 2
% P0 I7 S6 q9 |8 [7 i- Q+ T( l0 Z6 ?2 O- n9 i7 T1 w" J
# isoweekday() 方法: 1代表周一,7代表周日
1 g7 ]  W/ V5 u) rprint("isoweekday()", datetime.date(2010, 6, 16).isoweekday())  # isoweekday() 38 S) y* x1 r; l/ H5 m& V
# q, o4 ]+ q2 u( x9 f$ w3 J
dayofweek = datetime.datetime.today().strftime("%A")
1 ~4 z8 H% _& H) J/ @) Rprint(dayofweek)  # Friday& ]( B% p6 Q. x  z: R  q. N
print("weekday():", datetime.datetime.today().weekday())  # weekday(): 4
9 `* L1 g* b/ y* Z  y& ~# s, Wprint("isoweekday()", datetime.datetime.today().isoweekday())  # isoweekday(): 58 s: L7 @3 @& V* K' l- P$ H
) N1 }3 t" r* v" X
八、计算两个日期时间对象之间的时差; i& l) z1 i* p8 O. L% p' L
import datetime) t$ R; s; x& x, c8 x
from datetime import timedelta
- k7 A- g4 M3 h# N0 z) o% L2 R+ n% ?
datetimeFormat = '%Y-%m-%d %H:%M:%S.%f'
6 ~* y/ E8 J8 rdate1 = '2016-04-16 10:01:28.585'
  K4 E; t* |0 |% e. ]1 ?date2 = '2016-03-10 09:56:28.067'9 Z; q/ \3 F& M3 `
diff = datetime.datetime.strptime(date1, datetimeFormat)\
- A' z# ?1 V( Y3 P7 J    - datetime.datetime.strptime(date2, datetimeFormat)6 A% I7 S  Z6 I5 E( B7 p

+ o9 `+ g, |( `' R+ b% _! @4 dprint("Difference:", diff)  # Difference: 37 days, 0:05:00.518000; m! o1 f% T% j+ D8 \7 f! t( I1 }
print("Days:", diff.days)  # Days: 376 H9 e) t' ]) @6 f
print("Microseconds:", diff.microseconds)  # Microseconds: 518000
8 h. j( V; D+ g" ?print("Seconds:", diff.seconds)  # Seconds: 300
5 X+ g) g5 ^; z1 e5 `2 I* `8 j! \; T; D, S; X8 ]+ e, @
九、将 5 分钟添加到 Unix 时间戳* m5 U: u. g1 ]7 Q
import datetime
2 H  m3 @; \, V: W  Z+ ?" \" ^import calendar8 d2 M  x" U. C$ W$ r% T/ u9 q* I7 ^
8 u1 N, l: Z3 V) w% V0 m
future = datetime.datetime.utcnow() + datetime.timedelta(minutes=5)
' V" Y' m. o- V5 r& t2 S4 {print(calendar.timegm(future.timetuple()))  # 1621069619
9 C- }  ]2 A$ d7 Y" \- l3 f6 x7 X0 f. f5 @0 i% ?- z  S
十、遍历一系列日期
8 G+ i2 O" o- \; c3 ?1 E# L# simport datetime
( C8 |% r6 t3 H3 ^+ v- F) {, M" A0 \2 q% H
start = datetime.datetime.strptime("21-06-2020", "%d-%m-%Y")6 |9 q/ {5 W/ ]' i$ g2 w8 {
end = datetime.datetime.strptime("05-07-2020", "%d-%m-%Y")7 W  _  N2 r2 X* f9 m) L, X: g0 f
date_generated = [start + datetime.timedelta(days=x) for x in range(0, (end - start).days)]1 u) G$ m% j* d# z# T& }
; }: Y: n& X8 ~% G
for date in date_generated:
+ ?( Z% q7 `) H, a% t  t. F    print(date.strftime("%d-%m-%Y"))( _8 ]* k$ S4 V- T, m. h
6 _9 M5 x* M" t8 k2 G* y% W
十一、巴黎时间更改为纽约时间) K& f1 w9 E7 V, z9 n
import pendulum4 x6 c* G6 Y' N1 x5 C5 d" W

. y" W/ ~: J9 w! x" Oin_paris = pendulum.datetime(2016, 8, 7, 22, 24, 30, tz='Europe/Paris')' D; k; I- D8 K! {! c# t3 k3 I: h% t6 f
print(in_paris)  # 2016-08-07T22:24:30+02:00
: U% d0 g$ C9 @* W
6 d, G( v0 a8 I8 N* Q3 m# qin_us = in_paris.in_timezone('America/New_York')
# d; ?3 h9 @5 T* m7 m% c( [print(in_us)  # 2016-08-07T16:24:30-04:00, P! L4 X3 @/ G. I& L" |1 L

' E2 u0 D/ c' k/ H5 I$ f十二、使用 Python 获得最后7个工作日; ~" E/ M: A- \* s! L* {
from datetime import date: i. f# U. B2 T7 w
from datetime import timedelta
  h( e2 r/ K9 v7 I  [' K! w  z  K
! M' X* s4 a7 W0 ytoday = date.today(), g) D# q* n; m7 Z5 W+ y1 a/ v
; s  b/ @3 l: G
for i in range(7):+ r" ]4 ?0 {! p* V9 O
    d = today - timedelta(days=i)
; \3 L7 Z7 H9 E% |$ n0 E- X; D# A    if d.weekday() < 5:
3 b9 L3 _1 u! J' @# C        print(d)
( \  w  C3 _0 k  v6 L, |
+ t6 L2 F4 ^: i5 H  @8 Z2 Z十三、从今天的日期和一个人的生日推算年龄
0 r  P! Q' ^" N- Jfrom datetime import date
9 W  g' Q' Q% @# R/ E2 K, E
# q" P9 ?  r4 C
5 q8 z0 F0 U: ]2 E0 Z: t! J& i& mdef calculate_age(born):6 f0 k+ |3 A: l7 ?! C. R- M% G2 C
    today = date.today()0 J0 S" H8 q0 y5 P% [# M* k8 B; [
    try:
2 i* ?& M; B( s# G4 \0 H; ~        birthday = born.replace(year=today.year)& w2 ^) p  E6 r! [4 \% _' f
    except ValueError:; x3 A- H% g4 Q2 Y/ G9 s
        birthday = born.replace(year=today.year, month=born.month + 1, day=1)% s0 ~/ s$ r# N) _, i' L
    if birthday > today:
4 \& r8 h, ]; K' f; g' u7 @6 g        return today.year - born.year - 1
+ o1 [+ l( S  h: H- j: W* c$ |    else:/ c3 \# E9 v! y
        return today.year - born.year
7 c8 W( n3 G0 `3 X/ J7 d5 R0 c
  M/ U* {* m1 p# K, W1 L4 r. W3 [: K0 H1 Z% Q9 p
print(calculate_age(date(2001, 3, 1)))" O% y6 \3 N6 s7 a* L

) E8 r5 ]) ^* J十四、获得本月的第一个星期二- M# ]. S2 e4 B0 t- w' S; p# c
import calendar; Y/ A: V* ~/ ^
from datetime import datetime0 `' h5 L6 O: R( g

4 P& \; i6 D5 D+ l/ X) n7 Zc = calendar.Calendar(firstweekday=calendar.SUNDAY)
/ h' s# d( j" \$ i8 |' `" |monthcal = c.monthdatescalendar(datetime.today().year, datetime.today().month)
, {6 ^6 _+ b* V: A9 Y#Python小白学习交流群:153708845  # e2 ~8 J* Z% j; ]5 u
try:5 W9 z9 ~  {. W( Z' C
    tues = [day for week in monthcal for day in week if
+ x' `  l' O: i& Q- h            day.weekday() == calendar.TUESDAY and day.month == datetime.today().month][0]$ _) r" S6 |, n, F$ P/ r
    print(tues), K) k1 u# }3 u; L
except IndexError:' f, @! W$ X* `2 `$ `
    print('No date found')
+ L4 m! h+ @! i& T( \, U. E4 U( x) h
十五、将整数转换为日期对象
# o+ t& h+ ]( u& H: ~: n! [3 L2 \from datetime import datetime+ _" p- `* z0 |$ j

6 h0 w- P  ?5 R  H" z( Pi = 15457300739 r& |5 t8 s* j+ s/ Q5 k9 G
timestamp = datetime.fromtimestamp(i)
& Z, C. m3 [; y
- t$ U7 _. _  Y' d; K& q( Oprint(timestamp)  # 2018-12-25 14:57:53
. W6 y2 v+ k. W( l* B5 C" Qprint(type(timestamp))& [. n# B+ M* ]7 Q& u0 m) ]

; C7 W: M  Z( H十六、当前日期减去 N 天的天数* r) N3 t. @- x2 u
from datetime import datetime, timedelta
! v  d7 y: M6 X. @- J7 x
, y/ f! H. P) I1 {  Md = datetime.today() - timedelta(days=5), K3 g4 ?- e! t0 C2 l$ G
print(d)3 K" ^4 A6 W: |

3 _, A" ?' n: a: D( X十七、比较两个日期0 F8 Z* c4 O) X! e/ ~) |& y3 u) k
import datetime
& A2 d1 G6 |% T$ O9 C8 [% h5 k( w+ f' u' Y( z: m
a = datetime.datetime(2020, 12, 31, 23, 59, 59)2 D3 d# Z+ O6 y8 f2 E9 j
b = datetime.datetime(2020, 11, 30, 23, 59, 59), ]+ r  i! ]: O* t* @9 S( i

  B! X9 p# v4 n4 p9 G& v! yprint(a < b)$ }3 A8 P% m1 o8 w$ U& ]; x
print(a > b)8 h% q  a$ d9 p3 k2 l9 ?# B  ]6 d
+ I3 {1 {0 N  J5 ]
十八、从 datetime 对象中提取年份
( n' B: K+ N0 G* qimport datetime
( _8 t5 P/ v; F+ x7 Z6 a) @! T$ k
year = datetime.date.today().year) s0 h7 A- E! z! Z$ z- [
print(year)
/ m* \. A+ c0 j- `3 i, l- X: t: Q! t
( q! O! G% K3 u9 L* P% r, ~十九、根据日期找到星期几# g* ~% V& y* g3 J9 H" O; d* f2 e
import pendulum; b& @* l0 H. T. E  G; m; a9 B( R
$ q& a: b* @3 V: S2 F
dt = pendulum.parse('2021-05-18')0 K1 r+ g2 d* \; S
print(dt.day_of_week)  # 2$ b3 V% q' O; W7 w- b2 a8 P5 Q4 ]
+ \0 y7 U  `% J& j5 ], o$ _4 k
dt = pendulum.parse('2021-05-01')
8 Q% ]" D! q% G1 \' Qprint(dt.day_of_week) # 6: T. |5 `) C5 u. ~4 O& q

( Y: C2 k) c, f8 }0 W' G0 m7 }7 ddt = pendulum.parse('2021-05-21'); O7 ]% R/ t* K. f8 R
print(dt.day_of_week) # 55 \. S; Y0 H8 K  K2 \. ]8 [7 c% R

5 @% `2 l8 `6 N0 a' u4 Q二十、从当前日期获取 7 天前的日期
3 A3 I( v6 q: Y' j( {1 cfrom datetime import datetime, timedelta& X7 F, v. ^7 Z0 U( |/ S
- U1 R$ ^' A- ?5 h7 I3 H8 X
now = datetime.now()
6 _% @% o& _0 j! U! G6 z: @$ f. `2 A% z/ u, P! {2 b, n6 r" \
for x in range(7):
& d' M2 l0 k; k$ }4 Y- Q4 Q    d = now - timedelta(days=x)
0 f2 X( Q& d* a$ A5 Z, a  [    print(d.strftime("%Y-%m-%d"))$ J/ Y% X: o/ U- |$ ~$ i4 c

( a6 j- e% z9 O# ?& D二十一、将两个日期时间对象之间的差值转换为秒
: O5 E0 d9 y/ D8 S( aimport datetime. [5 x, P1 j. C1 K, D- p2 b

3 G+ V' u, o+ i6 Ztime1 = datetime.datetime.strptime('19 01 2021', '%d %m %Y')
/ E( [) R4 _. ptime2 = datetime.datetime.strptime('25 01 2021', '%d %m %Y')# S7 j0 p9 [1 O  D, W6 V+ r

& F3 a, z$ B; Rdifference = time2 - time1
# l6 {8 A, M% E7 b/ qprint(difference)  # 6 days, 0:00:00
! c8 T, H% n$ m; l/ v) f. ^5 F
4 N$ J3 V* @: j- Z6 ?" Xseconds = difference.total_seconds()$ {2 {& L. v/ H
print(seconds)  # 518400.03 E3 w. S, X6 e! Z
2 w' P) w' M6 u9 ^0 [
二十二、获得任何一个月的第N个星期五9 t1 E7 d  e, N* o
import calendar
/ N! c. C( P2 s9 T  m& c6 O
+ R! y! j" P! ?& x4 c6 Q) l5 w# 取2021年5月的第三个星期五
4 g7 R1 v: z/ ]- M  Qc = calendar.Calendar(firstweekday=calendar.SUNDAY)2 b3 {: X8 v4 U2 G
year = 2021& o( \2 O/ _7 s3 K
month = 5! i5 V* b) n& E- g% a
n = 2  # 取第三个
. M% Y* X- T! |6 E# Z, Wmonthcal = c.monthdatescalendar(year, month)
) W6 [7 c! B5 P  s
: m1 O# D6 M8 [: k6 t& rtry:
* G  u# Q* d1 \    third_friday = [
9 z- T# P1 _$ J  g* e        day for week in monthcal " x8 K) |6 k, q/ F! J
            for day in week if
" s7 G8 n' u& U5 R# E  i' {                day.weekday() == calendar.FRIDAY and day.month == month
) P' V* j5 l6 K/ s, R% p! K9 s( c3 X    ][n]
1 i/ b; x' l1 p5 L9 t+ V6 Z    print(third_friday)  # 2021-05-21- z& O7 Z2 W. i* o9 f; \
except IndexError:6 q8 A) R$ a' k, b' S
    print('No date found')
& P: a( }+ J% e9 ^, |7 S* f  c7 |# ^% m( B
二十三、根据周数获取日期
$ |  A% D  X, c( k. [% K- g0 mimport datetime. o$ }& z$ b$ A. h! C, ^, o9 h! Q
from dateutil.relativedelta import relativedelta+ R6 n4 {0 m2 V: Y" |
/ _. |6 A) B1 B" `# t) m8 m# ]
week = 25
$ M: I* f* `) M; O% \- B9 syear = 2021
8 [0 A, |  c$ g0 z' Udate = datetime.date(year, 1, 1) + relativedelta(weeks=+week)' E, J. Y7 d8 ~1 n
print(date)  # 2021-06-251 N! _- D: h/ w. K+ y3 k
+ p7 h' Q# C7 U0 }+ ?! D
二十四、获取特定日期的工作日" e& I. q8 ?- |# v$ x3 K
import datetime
) f1 S" m+ l, V3 o& }9 a
) G; H- W2 I, \$ Oprint(datetime.date(2020, 5, 15).isocalendar()[2])  # 5
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4 I0 v- [7 `& p' Y0 g( l% [0 {* N二十五、创建一个 15 分钟前的 DateTime0 C7 J0 `; h1 ~" Z+ t8 L/ m
import datetime
$ j* r& s5 q8 u% H! E. p#Python小白学习交流群:153708845  
. q' l: Y6 R% L. `" H6 K! ddt = datetime.datetime.now() - datetime.timedelta(minutes=15)! }3 [( C/ p0 U
print(dt)  # 2021-05-15 22:25:55.8973652 }* @+ d) q' l9 n
) i, p/ I/ j, p! c
二十六、从特定日期获取周的开始和结束日期
, B% p* e* p7 t# Qimport pendulum
, d" S1 I+ V8 n% y4 b5 j
6 n' _- Y) X& S* Tdt = pendulum.datetime(2012, 9, 5)$ _0 P, j7 {# {6 S- d4 d
/ z! h: H% f! C% D& b" Q- W. e- v# Q
start = dt.start_of('week')
6 E! C/ M! D: D; m4 Zprint(start.to_datetime_string())  # 2012-09-03 00:00:00) C& n$ B# t- r9 b; B* P
; ]! h1 s/ K4 {$ Y2 C
end = dt.end_of('week')
4 \* p" e( O+ pprint(end.to_datetime_string())  # 2012-09-09 23:59:59
! w# g& y: j; u: T) G1 ?1 u( k! s7 A( y! W) M$ i/ D; U/ x* q
二十七、两个日期之间的差异(以秒为单位)# t+ _/ o* R- r1 ]
from datetime import datetime1 x6 G. q. C+ D7 E
#Python小白学习交流群:153708845 - J* \1 Q3 g+ k
fmt = '%Y-%m-%d %H:%M:%S'* H( X3 U$ B0 i0 [, \
d1 = datetime.strptime('2020-01-01 17:31:22', fmt)
. w; z) f" q! |+ {" Kd2 = datetime.strptime('2020-01-03 17:31:22', fmt)
! ?8 W% _1 Y9 R( D/ P" h* n6 }0 k, E8 h
days_diff = d2 - d1% ~4 }  s; m& m) F* J; {) N
print(days_diff.days * 24 * 60 * 60)  # 172800, {" H8 x9 X  p$ o- V1 s( P

0 |* M! Q6 P+ l1 u4 l, O二十八、以这种格式获取昨天的日期MMDDYY
( P  {) J! U% y$ L* i+ u- Efrom datetime import date, timedelta
! M: E4 m' p: R; C( M6 s( A$ a0 P8 B# G7 l: O! L! X
yesterday = date.today() - timedelta(days=1)
2 {" s7 _# [% Aprint(yesterday.strftime('%m%d%y'))  # 051421
$ @7 Q. `" |! |# q# A% h' Y- C) A, H
二十九、根据今天的日期获取上周三的日期
0 Q0 y. N4 m8 P: a) D+ I( `from datetime import date' a( j) a9 N* {  F7 c: c9 v
from datetime import timedelta# N2 }# W" c& H

: U& Z/ O3 t; T/ z* @+ ]: f3 a* ]today = date.today()  N, V7 P0 I% I& C9 e

2 X2 f" p' q. p( |4 @; M. Qoffset = (today.weekday() - 2) % 7
0 s3 O$ u8 A; X5 N' zwednesday = today - timedelta(days=offset)+ I5 E5 T6 G) [! T: E) w! Q
print(wednesday)  # 2021-05-12
0 J2 z, O; n" a  u3 D* ^7 p9 j2 M$ T/ O8 ?* ]2 T
三十、所有可用时区的列表打印
$ \, {8 ~7 c# himport pytz
# V6 z9 C3 _, ?$ g
. h7 Z8 |9 K- p# h& `' n5 efor i in pytz.all_timezones:  }3 G, S7 y# K% r6 Z( p- F
    print(i)) V3 r  W3 Q- r! c! D

4 k/ h0 N* y9 Y% ~3 G1 ^8 z8 V: r- }1 J1 h/ ^3 u2 A

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