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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$ ?% d9 e9 }3 c; {. i/ ^9 M8 s
import time
+ K+ B" c4 P* j5 D# ifrom time import gmtime, strftime  A' {! J4 b. c# |1 M0 Z& T  b

/ e+ o8 b; u' K: R/ et = time.localtime()  7 K% W! [% ^' G5 Z; X
print (time.asctime(t))  # Sun May 7 09:30:37 2017
1 j  `  e- l3 n1 g3 s" `print(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()))  # Sun, 07 May 2017 04:00:37 +0000
) B2 B2 D0 d- |) Gprint(strftime("%A", gmtime()))  # Sunday
. g% V0 L# W8 t/ {  Cprint(strftime("%D", gmtime()))  # 05/07/17
8 H( B' t/ e/ H3 K- fprint(strftime("%B", gmtime()))  # May
+ |# Y$ M& Q# Q3 ]' Iprint(strftime("%y", gmtime()))  # 17
6 [% D; g' d% X" Y; M, k) |9 }% S  }* \
# Convert seconds into GMT date- T( E* u" `" X% }# J  C
print(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime(1234567890)))  # Fri, 13 Feb 2009 23:31:30 +0000
1 B3 |  v; a. n+ O0 G
5 t; [# r* G$ u- s/ c, R二、将天、小时、分钟转换为秒
, d# b1 G  i1 Q4 z4 X7 O  `SECONDS_PER_MINUTE = 602 B7 @0 z! P# n8 H- \8 p
SECONDS_PER_HOUR = 3600; ~' x+ H0 H! y! M% |
SECONDS_PER_DAY = 86400& \! C' I# Y0 z: S- o0 K

4 Y9 c$ J9 m5 ~9 Y# 输入天、小时、分钟、秒的数量6 Z8 [9 g. J$ D
days = int(input("Enter number of Days: "))
( t7 u" G6 q0 {2 R6 ^hours = int(input("Enter number of Hours: "))1 c& D! N1 u1 h" p% j2 H
minutes = int(input("Enter number of Minutes: "))% |0 s8 e; F: k
seconds = int(input("Enter number of Seconds: "))
  ?0 D" s8 o+ }8 r9 }# W7 b
- u$ B! u. l* n$ c7 t, @0 _( P# 计算1 F# F1 ]. u. i% e+ `2 Z6 R
total_seconds = days * SECONDS_PER_DAY
+ f7 a% C4 j& I3 a- S. J; t( G3 ytotal_seconds = total_seconds + ( hours * SECONDS_PER_HOUR)
. \# {# q  g( V$ Ktotal_seconds = total_seconds + ( minutes * SECONDS_PER_MINUTE)
( S6 t$ u0 L4 jtotal_seconds = total_seconds + seconds% l: n/ @- Q- H: y1 a) X

) t8 C2 J% L0 K1 a# Y8 y9 \# 结果
) T" I: p2 J9 Q* q2 L/ G  ~print("Total number of seconds: ","%d"%(total_seconds))
" q: ~- i; q, x0 e'''
2 W& Z# m3 ]0 \$ kEnter number of Days: 59 W2 n8 G- |0 m& Q5 H
Enter number of Hours: 36
7 v: {8 h% z! {/ K; B; S7 TEnter number of Minutes: 24- {6 Z" t3 M5 a' r
Enter number of Seconds: 15/ W) u6 o$ r- Z9 s7 B+ V7 m! V6 D6 D
Total number of seconds: 563055
# {$ d6 Q/ m) d+ l1 ]2 \* n. }1 w" `'''
3 J$ H8 u- w9 j) ?" s* u; @/ E
三、使用 Pandas 获取当前日期和时间! R9 u9 j/ g2 G1 ^0 N6 g7 x% P
import pandas as pd  t) v/ ]: K9 B5 T0 {. w
print(pd.datetime.now())  # 2018-01-19 16:08:28.393553
9 ~6 {) w. h) g9 H8 hprint(pd.datetime.now().date())  # 2018-01-19
0 c* I( ^/ C  V6 E6 ?  \1 H8 tprint(pd.datetime.now().year)  # 20181 d+ Y3 |) w: P$ Z& l
print(pd.datetime.now().month)  # 1
) s6 X& }8 X& F! Wprint(pd.datetime.now().day)  # 19
  a/ O7 d& [- J8 v' M( q: sprint(pd.datetime.now().hour)  # 16
9 ]% x2 U5 V3 n, C/ pprint(pd.datetime.now().minute)  # 8# G' S6 \0 s0 }) T+ r. R$ b
print(pd.datetime.now().second)  # 287 c4 y$ q1 U7 }1 S+ G1 w
print(pd.datetime.now().microsecond)  # 394553# h% \$ d5 h3 m) R
# X3 o# B$ h" i" R8 T
四、将字符串转换为日期时间对象
  b  V3 I: B$ |- d8 s) bfrom datetime import datetime
: o) n" M  K3 U; Y( w* Ffrom dateutil import parser# n* ^5 b) x  c
  ]' D  `9 c% I' \; N
d1 = "Jan 7 2015  1:15PM"0 `8 A0 B! a: i. T% t
d2 = "2015 Jan 7  1:33PM"! {  R7 m- v( D" o* o; Y# p4 G  Q

* n: O+ o1 \- N% N- [# If you know date format$ m1 m; C0 j$ B: i( c3 m& ]
date1 = datetime.strptime(d1, '%b %d %Y %I:%M%p')4 D; o; z& Z9 m9 G- s' L
print(type(date1))  # class 'datetime.datetime'
4 m3 I5 o' |" s# K. Mprint(date1)  # 2015-01-07 13:15:003 n  T! K4 N* ?) m: ^
% N! k/ E* U1 c8 c, v3 ]; K) L
# If you don't know date format* D" y; @' l3 [/ a
date2 = parser.parse(d2)0 @6 p+ I) d7 \
print(type(date2))  # class 'datetime.datetime'( \3 y3 m. A/ J' d& ]) t
print(date2)  # 2015-01-07 13:33:00- Q) A5 n( J0 L0 v- j3 B$ P

( L* j; ^! F  u- Y五、以毫秒为单位获取当前时间
7 G6 g, C* D* _+ }4 L" qimport time
9 ^. r7 D$ P5 y- A0 U9 r! k
% S/ G  A9 y% X/ h, _8 }1 Z' {milliseconds = int(round(time.time() * 1000))
# i8 o/ V" }$ h: f) }0 k* `print(milliseconds)  # 15163642706509 ]3 p) j- N! o: s. S! v
' W! Q5 m& Y8 S
六、以 MST、EST、UTC、GMT 和 HST 获取当前日期时间
* V2 N( M3 Q+ p6 m1 x# e' ?from datetime import datetime
) u3 {- w9 M5 U7 x; lfrom pytz import timezone
2 w) w1 M5 h* F/ |. [: I1 |3 H4 j2 H# _
mst = timezone('MST')  i. }6 @% d( Z% j0 R% k
print("Time in MST:", datetime.now(mst))  # Time in MST: 2017-01-19 06:06:14.495605-07:00
- ]: d' ^. X2 C2 N: D; k6 h# eest = timezone('EST')& D- ?4 }0 J3 l: {' n0 B' O
print("Time in EST:", datetime.now(est))  # Time in EST: 2017-01-19 08:06:14.496606-05:00
: x- P; \  K+ ^( W# Autc = timezone('UTC')
: k2 w; G2 S; `# D( r0 p) ]print("Time in UTC:", datetime.now(utc))  # Time in UTC: 2017-01-19 13:06:14.496606+00:00
/ @, o$ }' r- v$ k' \4 t( jgmt = timezone('GMT')5 ?1 `0 E( l9 G+ u2 A+ u% z
print("Time in GMT:", datetime.now(gmt))  # Time in GMT: 2017-01-19 13:06:14.496606+00:00
# C% r; Z' G! E9 M: bhst = timezone('HST')
3 x5 X, e, U! b# B* R+ Vprint("Time in HST:", datetime.now(hst))  # Time in HST: 2017-01-19 03:06:14.497606-10:00
; E! v/ H* G; ~% F  g% v( a9 y% }. ]( |0 w2 A" n
七、从给定的日期当中获取星期几6 C3 \7 n3 q6 i% U$ Z% @
import datetime
$ R( i8 M; c$ V  v
* U* }2 l/ g1 o* k( \dayofweek = datetime.date(2010, 6, 16).strftime("%A")
5 R& f& V8 q- {8 G+ W9 ^print(dayofweek)  # Wednesday- n) L# _# C. k, Q1 S& \
3 T; d+ a" G/ y
# weekday()方法: 0代表周一,6代表周日- G0 y! H3 ]9 T) G) x- W
print("weekday():", datetime.date(2010, 6, 16).weekday())  # weekday(): 2
) t1 h/ G! I6 @* _
2 U1 U$ `  r3 p$ ]( f$ @  c( Q8 x. A) `# isoweekday() 方法: 1代表周一,7代表周日: v, _; z# P8 O: C; V8 c) a9 A8 F1 t
print("isoweekday()", datetime.date(2010, 6, 16).isoweekday())  # isoweekday() 3
' F! u( K" P7 p0 [" [. e1 _* X9 ?3 A$ ~5 V' \9 x. d
dayofweek = datetime.datetime.today().strftime("%A")
* M7 V1 K& _% t  W0 Z7 E: I  fprint(dayofweek)  # Friday8 u  k9 G( j6 X
print("weekday():", datetime.datetime.today().weekday())  # weekday(): 4
( n4 J7 O- h4 J' _4 n! vprint("isoweekday()", datetime.datetime.today().isoweekday())  # isoweekday(): 53 C2 ~8 b6 ~  J" @3 d; u% G, A

. {  D3 L8 l% `, ?! w; [八、计算两个日期时间对象之间的时差
0 a. o1 l0 R* Q' c3 a6 ]import datetime
8 D% n/ X# f' {* Jfrom datetime import timedelta+ B' l  K" D0 E/ l! s2 U
/ p4 P! U  `' U) O5 k, Y; U) P
datetimeFormat = '%Y-%m-%d %H:%M:%S.%f'* G$ p( B1 a9 [4 ~( o  Z: H
date1 = '2016-04-16 10:01:28.585'
5 s. U' F5 i2 Ydate2 = '2016-03-10 09:56:28.067'2 z( Q* C& |0 T, A4 V5 b# Y) J
diff = datetime.datetime.strptime(date1, datetimeFormat)\
# Y& d2 f  {% y1 o    - datetime.datetime.strptime(date2, datetimeFormat)
4 C* M6 R! B5 q# G" o
7 X% @$ H7 [: Gprint("Difference:", diff)  # Difference: 37 days, 0:05:00.5180009 f; ^+ x4 g; T3 Y% |1 Q
print("Days:", diff.days)  # Days: 37
6 ]6 B3 o3 q# m* ~print("Microseconds:", diff.microseconds)  # Microseconds: 518000$ k$ e4 P" u" A& Q8 L. u' }
print("Seconds:", diff.seconds)  # Seconds: 300. q0 V# r" Q3 n0 U2 h
0 R' r( x; g" h9 {  g
九、将 5 分钟添加到 Unix 时间戳
7 A4 v4 K& r; @8 _2 W7 simport datetime& m1 R1 ^: c9 ~
import calendar# \, O( @" e8 R# A
' A- n% p2 y$ w" q
future = datetime.datetime.utcnow() + datetime.timedelta(minutes=5)
8 V. u% y0 C: F# xprint(calendar.timegm(future.timetuple()))  # 1621069619
& ^8 \& e4 J/ `  |! q, O& Z
5 ^4 g' o, j* \+ c& p9 R十、遍历一系列日期8 A# G+ E& L8 |  r3 Q* E
import datetime& F/ B6 f4 o( p6 d  V3 t9 n

& c9 b* }4 o3 D3 `/ C  w9 Cstart = datetime.datetime.strptime("21-06-2020", "%d-%m-%Y")& L7 N9 i9 a% L/ c0 O' l2 r
end = datetime.datetime.strptime("05-07-2020", "%d-%m-%Y")
; Q  K0 H! u7 r% n3 F" idate_generated = [start + datetime.timedelta(days=x) for x in range(0, (end - start).days)]
9 J0 K3 U% G- ^! j6 O* W) p: {: u( {: J, F" J4 K! u5 G3 ?% S' D
for date in date_generated:9 P, B* ?, ?7 S
    print(date.strftime("%d-%m-%Y"))
) r3 B2 i0 R8 T) P
( \# J4 n' X; `9 o3 q8 r  S十一、巴黎时间更改为纽约时间: W) f3 \- b+ i) I5 S/ f
import pendulum
# z. U1 |9 w% T6 G* d/ f; r
4 |2 G7 G" b7 ], P1 |4 Xin_paris = pendulum.datetime(2016, 8, 7, 22, 24, 30, tz='Europe/Paris')9 L9 e' U" \9 g
print(in_paris)  # 2016-08-07T22:24:30+02:00
8 O# \+ E9 {* m
8 w) D+ p# j2 P2 k3 Uin_us = in_paris.in_timezone('America/New_York')
& S1 Q$ D3 B; S3 N* Dprint(in_us)  # 2016-08-07T16:24:30-04:006 E, }% D0 b3 J- `# C8 f0 E

- M) U' j% L' X! K( O6 y- z% y十二、使用 Python 获得最后7个工作日% U; a8 h2 C" R' h% `. f: c
from datetime import date$ T+ x: c  G+ q% y, s0 ?1 @3 s+ v
from datetime import timedelta( I. D+ z6 O' x- \8 A8 A

8 z* m) ~! G7 ?today = date.today()0 n8 V3 n9 w" [/ O
* f$ I$ A& [* f) S6 X
for i in range(7):1 h& z, w& ], x4 ~
    d = today - timedelta(days=i)
- D! }7 w8 R. [# C; G0 a% i% h    if d.weekday() < 5:0 g$ s5 {! X" E. ^0 O9 D
        print(d)
% K# R; L6 I- N0 p% V/ T# V: f% Q3 m/ e8 }
十三、从今天的日期和一个人的生日推算年龄
2 f% N; ~0 v) F  J, {from datetime import date
8 M( U! I5 A/ |4 L) G9 y$ o8 X0 w! N( A

0 O9 [, o$ j! ?3 rdef calculate_age(born):3 @' F7 D6 y7 \  v" A. Q; J
    today = date.today()3 h$ Y5 e& W; n8 ]: Q* f
    try:! Q" B3 {, O2 G5 ?( d2 l
        birthday = born.replace(year=today.year)
- T3 s  D3 v: B: T2 C( [    except ValueError:
/ H; n) L: q: \8 X        birthday = born.replace(year=today.year, month=born.month + 1, day=1)
/ k6 B3 W6 S1 |/ q; F    if birthday > today:2 y( }% C) n, v# r
        return today.year - born.year - 1
+ k+ E- Y: A- O, t9 B    else:" A' F- Z2 J5 k* v
        return today.year - born.year
" ^  d! q: ^/ T! V, t% d4 h; A! I
3 _7 _! X; i7 I' I
" y0 T. @& r" qprint(calculate_age(date(2001, 3, 1)))9 E  B* f$ [0 p6 Y  u
$ @4 I' x  ?' E, t& O, i
十四、获得本月的第一个星期二
. P. L0 d7 g7 ]2 eimport calendar
0 @. Q3 r0 ^0 c! R" [( x1 D: \! J' yfrom datetime import datetime. x3 r& ^; D2 E

/ I9 N5 f) q& N, C2 Cc = calendar.Calendar(firstweekday=calendar.SUNDAY)
5 H3 Y: s1 d0 E. l# P+ a, Omonthcal = c.monthdatescalendar(datetime.today().year, datetime.today().month)3 z0 a) }# K( c" `
#Python小白学习交流群:153708845  
0 c; |6 [% p5 }8 L1 Btry:2 t+ }) `) g5 {0 I5 e' {  O
    tues = [day for week in monthcal for day in week if
9 _* K/ l$ r5 Q- |7 ~7 c" p4 u" N            day.weekday() == calendar.TUESDAY and day.month == datetime.today().month][0]( H/ o# q7 r$ G- p8 I! _: ?" W
    print(tues)4 E- O& y' u0 L1 s
except IndexError:
! y- r, R9 M; y4 q+ R    print('No date found')) q6 a$ S& B- R
3 G- U& R3 E9 ~& E1 S" n# y) X
十五、将整数转换为日期对象% }' q5 B; L- ^9 Q2 ^
from datetime import datetime
9 _) r8 ], C* F5 B
. x& ^* |7 v% B) J  z# Si = 1545730073  R# y  @3 F" M1 d
timestamp = datetime.fromtimestamp(i)
& A, F" u2 }6 g( i9 k- b
( M: O" j; o  Q; B# Eprint(timestamp)  # 2018-12-25 14:57:53! {" w. H# z6 i! s8 y$ q
print(type(timestamp))$ n* U. e) G( D& r
9 c# F1 L# v4 J
十六、当前日期减去 N 天的天数
8 l# m. ?$ z& }from datetime import datetime, timedelta+ S+ B# e" \; m0 T

# l: |- n; A) z* ?d = datetime.today() - timedelta(days=5)
( a, L9 x8 x7 d! _/ Iprint(d)- F" C! T2 C3 j5 C. [; j
3 g0 z0 Z* f; `) F* S
十七、比较两个日期) m7 i2 E- s3 T. j. P+ x& _
import datetime
- Z* Y9 q0 z4 |. f+ k9 u4 B* C
( W; {; @8 ], [4 S$ ?5 G" C% R0 M  Oa = datetime.datetime(2020, 12, 31, 23, 59, 59)
7 B2 p6 Q7 ~) k0 Y/ v* c9 xb = datetime.datetime(2020, 11, 30, 23, 59, 59)1 A% N; @: H& N2 Y

# Y* A, E5 ?( v2 N7 S  @% Gprint(a < b)
9 Y- C# q% X' t& `' cprint(a > b)# a, ^& a3 b8 _
+ B' g9 z; D# N3 e
十八、从 datetime 对象中提取年份
4 r& O; W3 D# ]0 W' bimport datetime
, ~! R1 o# ^- W8 _1 u0 V' z$ s) d3 H
year = datetime.date.today().year
0 o/ }: ?3 M) Y8 W/ H- D1 Qprint(year)
, F2 P: J2 P: p# U
; g* A. [- p1 H1 E0 p% l, l十九、根据日期找到星期几
% U- P' F8 F  _" a' V1 Gimport pendulum
% O+ x' Y3 Y# n: w/ o8 K: |5 Q. u0 r
dt = pendulum.parse('2021-05-18')2 A* Q; s8 V5 w1 @9 _" {
print(dt.day_of_week)  # 2
3 _; A- V) F$ l: ~9 O& L( Q4 |# Z! ~) G$ G9 P; j
dt = pendulum.parse('2021-05-01'): Q4 M" G. x* p" b  G/ t
print(dt.day_of_week) # 6% ^! i0 \% ~9 n

2 k" }. o% g) R: L3 ]dt = pendulum.parse('2021-05-21')
0 y. D5 A5 c+ A8 ?( E  Y6 Hprint(dt.day_of_week) # 5
5 K0 z4 v, x( O% f: q
2 u) [5 b6 x. G& }1 G二十、从当前日期获取 7 天前的日期* {' ~( Y) I" |6 A( k* `7 J
from datetime import datetime, timedelta6 r2 f8 U3 H, S: f1 I
- O# j0 D5 k/ V) R6 k, V
now = datetime.now()
$ D' [# C4 m: Q2 `+ ]+ J$ m( n* o) Z! k9 N; r$ Q7 m$ L0 Q
for x in range(7):* O2 K& H! `: K
    d = now - timedelta(days=x)
7 S+ p3 h/ Y5 E& L2 C    print(d.strftime("%Y-%m-%d"))
& @2 |6 H6 }: E& E
6 R% c" |9 [' u6 L二十一、将两个日期时间对象之间的差值转换为秒
: \) X. d* o" v8 f7 P& N, R' iimport datetime
& _* M0 H2 g* E$ F$ K: T. @  W2 Q& G) B0 M2 A, u: N/ e' u4 \
time1 = datetime.datetime.strptime('19 01 2021', '%d %m %Y')* g, F# \6 `3 b  f' b
time2 = datetime.datetime.strptime('25 01 2021', '%d %m %Y')) P( n9 d) J9 p9 a

9 U; E& N* \! x* S. |; W4 D: B. e* kdifference = time2 - time1
0 T# _  A- H$ _; K4 s4 G& ^7 zprint(difference)  # 6 days, 0:00:005 z; R" l' c: y( G- o9 |9 A

9 I* a- m+ x  L+ N% y# @seconds = difference.total_seconds()
$ B  Q& U  B. ~3 P: s  z7 |: Mprint(seconds)  # 518400.0; n! Q/ u5 O1 I' i* f3 m. H

5 A1 \5 H' a; A$ I! l( P8 i2 d8 H, W二十二、获得任何一个月的第N个星期五! n% ]6 ~2 k( Z
import calendar
) `6 i* D3 n9 S9 E9 q+ o7 D+ t
, c& u. g+ a- l7 ^1 I2 N8 u& H% t# 取2021年5月的第三个星期五9 S- U3 ]2 C" {$ J- A
c = calendar.Calendar(firstweekday=calendar.SUNDAY)( ~  c' r' Y( }
year = 2021: L6 T' G- x7 e+ l) H
month = 56 t8 N6 P8 t9 g, E9 c/ [: W# n
n = 2  # 取第三个
0 Q' ^& D+ y8 O6 Y! Cmonthcal = c.monthdatescalendar(year, month)
7 Z. h, g8 v2 D, q; J5 X0 s2 B; B& g" }" H
try:3 r: h( s( @$ i4 s
    third_friday = [
8 H: {( T  T6 a5 A6 ~        day for week in monthcal
' b/ B) ~1 A& G0 E( n            for day in week if- C! q- Z% T3 T9 v" L
                day.weekday() == calendar.FRIDAY and day.month == month) g6 ~5 S$ C0 b: G. g6 |  z' I
    ][n]6 V7 q: B) W  b) c7 B( l/ }2 N
    print(third_friday)  # 2021-05-21
' y! f- t, k/ f+ [& g, uexcept IndexError:2 H2 U8 H) |, @6 _3 b
    print('No date found')7 O4 z7 V: g0 U. B6 c6 J0 W, y
1 N3 u9 J  X/ N, l
二十三、根据周数获取日期
' g3 L. A1 V5 `4 C9 U* Iimport datetime( W5 b& s2 _; i# i" r
from dateutil.relativedelta import relativedelta; n% Q. J7 p/ H$ Y" e

$ M5 J4 S7 ~# Jweek = 25% c. V, l3 V1 j+ s: Q& S
year = 2021$ r0 I# m  w# P) X
date = datetime.date(year, 1, 1) + relativedelta(weeks=+week)8 V* E3 o5 T7 ~% q
print(date)  # 2021-06-25( W' f# K. M) J' S  R2 v* M( C

+ C+ U+ b7 x3 h* v9 d+ n/ R二十四、获取特定日期的工作日
! X7 `/ [% v. o: j$ H7 g  Iimport datetime! b. q4 Y9 a$ o6 U

* [3 B; b( o" zprint(datetime.date(2020, 5, 15).isocalendar()[2])  # 5
# F6 M9 V2 u# L9 w/ `2 `* e
. O3 ^, c6 _1 B, {4 i+ k二十五、创建一个 15 分钟前的 DateTime) I0 ^2 p' y2 t* I
import datetime. ^  b+ J. q, l: a. p3 |
#Python小白学习交流群:153708845  
, g4 k2 y1 R- d' ]2 @dt = datetime.datetime.now() - datetime.timedelta(minutes=15). ~1 V0 y) |+ k
print(dt)  # 2021-05-15 22:25:55.897365
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二十六、从特定日期获取周的开始和结束日期
: p% v, f7 d! k  o) F+ _/ |import pendulum2 d% _  t; O, u1 H3 p# ~7 Y' y

% J& X: Q  L& n) }dt = pendulum.datetime(2012, 9, 5)
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start = dt.start_of('week')* r4 b8 i" j# o: K) m
print(start.to_datetime_string())  # 2012-09-03 00:00:00
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4 @8 V" [3 |9 f6 ?3 iend = dt.end_of('week')
. _) H0 c" W" wprint(end.to_datetime_string())  # 2012-09-09 23:59:59. l% m+ J2 v: l, P; d( _) Y* g& U

, M/ d6 v  h# k  g- a9 j二十七、两个日期之间的差异(以秒为单位)
$ H4 x6 Y8 Z1 I9 l- p, J. b/ e" P8 ~from datetime import datetime. U, C+ P5 U0 `7 J; B$ P8 B* K7 d
#Python小白学习交流群:153708845 . t- x0 v& u, ^
fmt = '%Y-%m-%d %H:%M:%S'3 m( h& Q6 l' S3 _1 W! q# O0 N) R
d1 = datetime.strptime('2020-01-01 17:31:22', fmt)
/ a% v8 N( O* Nd2 = datetime.strptime('2020-01-03 17:31:22', fmt)+ n* F4 ?- y. c
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days_diff = d2 - d16 |& r, M, b2 [$ n' f' a
print(days_diff.days * 24 * 60 * 60)  # 172800- z2 A! b) B6 H; K# @/ s

9 f+ C0 w  i# f# N二十八、以这种格式获取昨天的日期MMDDYY
! U. T5 t1 v& |1 I" gfrom datetime import date, timedelta- r9 n8 y  M3 A: [4 h$ i
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yesterday = date.today() - timedelta(days=1)1 [' s0 a+ n+ m/ ]0 a
print(yesterday.strftime('%m%d%y'))  # 051421
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/ K0 W- z- Y/ z& F二十九、根据今天的日期获取上周三的日期
1 {( l6 O! `; Bfrom datetime import date9 f7 N) s9 b/ u8 j+ C0 ~, a/ T4 L
from datetime import timedelta
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today = date.today()
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. K, e& O8 r5 Q; F/ ^7 s- X& koffset = (today.weekday() - 2) % 7: w4 }7 w" _3 @% I7 z8 S
wednesday = today - timedelta(days=offset)
' Z' C" O+ S7 Q6 O$ `5 ]print(wednesday)  # 2021-05-12
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& N5 _9 _& W) {) ^三十、所有可用时区的列表打印6 j+ x. H2 ?" T' r
import pytz. o7 |$ U: ~3 a: m9 W/ W- o# d
  g3 l9 n4 V0 N: Z7 U
for i in pytz.all_timezones:' ]  n8 ~) b* A  Q; D( y+ E5 \
    print(i)9 @. |+ T+ N7 \8 s& E
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% k; s+ A7 k. ]% ]

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