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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+ h6 F! y; d; w
import time
4 U- H/ R# o% h/ afrom time import gmtime, strftime  R9 t6 q) C6 d
% M+ Q: D& l7 x8 |) B/ S/ E
t = time.localtime()  # F2 x2 D9 C* {2 J; p
print (time.asctime(t))  # Sun May 7 09:30:37 2017. K6 e+ H6 N- U/ O. f5 D6 b5 D' x& j
print(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()))  # Sun, 07 May 2017 04:00:37 +0000
9 e3 l! L" d3 w/ ?# uprint(strftime("%A", gmtime()))  # Sunday: ?( S+ z3 |. p' V& O. G7 x, y4 }$ t
print(strftime("%D", gmtime()))  # 05/07/17; ?2 T! ]- f: R7 \
print(strftime("%B", gmtime()))  # May  J, _  g8 ]2 V6 t7 Z! i
print(strftime("%y", gmtime()))  # 17
7 t+ r; H- R5 m6 L, W' A+ F' @' _0 N# ]' k
# Convert seconds into GMT date
8 l2 l. ~4 l( `2 Qprint(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime(1234567890)))  # Fri, 13 Feb 2009 23:31:30 +00008 A' |2 X+ X8 Y' K; Z9 R4 P
/ d( u0 r3 e6 m9 M% U. S% J2 P6 d7 C
二、将天、小时、分钟转换为秒
, F5 A8 g" y2 b" N& q3 p) f. e$ P5 I! TSECONDS_PER_MINUTE = 60/ i1 |4 j7 ?) r
SECONDS_PER_HOUR = 3600
& `4 ^: r# i4 P% D! J/ f' dSECONDS_PER_DAY = 864000 F1 {2 J' y) M/ r+ x
) I6 b9 J) p$ d
# 输入天、小时、分钟、秒的数量
5 C, z) \6 X  k2 Bdays = int(input("Enter number of Days: "))7 r9 R) Z8 q7 r4 d1 k- E
hours = int(input("Enter number of Hours: ")). q2 y" x9 a! o( y  H% Q
minutes = int(input("Enter number of Minutes: "))
; @' r& |! E0 m& Z8 Jseconds = int(input("Enter number of Seconds: "))/ v1 W9 B8 X" |  m, u4 K
! ^& L9 A) Q" _" ^% D
# 计算
+ f4 Q: U8 h6 Q8 X( X1 A7 z+ C% ktotal_seconds = days * SECONDS_PER_DAY5 b7 N+ r8 z5 J5 Y' O% g
total_seconds = total_seconds + ( hours * SECONDS_PER_HOUR)
/ [2 B* r! u8 N. Etotal_seconds = total_seconds + ( minutes * SECONDS_PER_MINUTE)' [/ Q' ^& K3 x8 X: h# u6 O
total_seconds = total_seconds + seconds4 g8 {# ^- F7 a  H/ C3 M; ~
3 _( K5 S: W# i7 ]) T
# 结果
4 M, |3 E5 I4 I0 G. `8 @" Hprint("Total number of seconds: ","%d"%(total_seconds))$ H( l: j8 u" [( ~/ v% J* Y, l
'''9 m  E# i% q- m- g/ J/ u! k* e1 A1 T
Enter number of Days: 5
1 q9 _4 t9 W4 V) o: q/ aEnter number of Hours: 36
; S& n7 b$ f9 {! Z$ u4 R  ZEnter number of Minutes: 24
& j: l$ j* K! Z) W* @Enter number of Seconds: 15! T5 s; @5 Q/ G$ A
Total number of seconds: 563055; |  G9 F4 s/ }$ O) r
'''
/ f2 d' X8 I3 ]/ C* c9 [- M- {8 i& w
三、使用 Pandas 获取当前日期和时间
3 }/ h+ {1 d9 N; L; A8 r3 N& `import pandas as pd
4 O6 S8 h' q: F/ n+ ^print(pd.datetime.now())  # 2018-01-19 16:08:28.393553$ y. c6 I+ E9 m, U) F
print(pd.datetime.now().date())  # 2018-01-19& B- y# R7 f! _
print(pd.datetime.now().year)  # 2018
1 r7 c6 ?4 |" J0 ]print(pd.datetime.now().month)  # 1
3 {# Z6 s2 @' R0 vprint(pd.datetime.now().day)  # 19+ U- K) }5 T6 G7 @; [' c' ?
print(pd.datetime.now().hour)  # 16
; V+ _5 e; X, }) U! _( _8 H. qprint(pd.datetime.now().minute)  # 8
. l/ ]  A+ X9 wprint(pd.datetime.now().second)  # 28, f  v) x3 c5 T: o% C
print(pd.datetime.now().microsecond)  # 394553
& h- F! Z  Z* J, D- J
8 b2 f5 S4 W' G6 J. e四、将字符串转换为日期时间对象* I9 M* {; a* x
from datetime import datetime
/ i/ B/ f4 Z7 [+ Z4 i" N  {6 dfrom dateutil import parser. u) _9 F- I' W7 ^* W* w6 t. O

6 d& _# O: v2 L  O( h) ~d1 = "Jan 7 2015  1:15PM"/ e$ Q: v! s, G3 b4 {
d2 = "2015 Jan 7  1:33PM"/ I! }+ S0 e$ [/ I! g0 L
- n0 D/ `4 W9 H6 d# x
# If you know date format. c5 h8 l. j/ N! }. a
date1 = datetime.strptime(d1, '%b %d %Y %I:%M%p')
8 M  w5 @8 s* k8 V# hprint(type(date1))  # class 'datetime.datetime'
; `8 `) c& T2 d* d* p! Iprint(date1)  # 2015-01-07 13:15:004 M( l. J+ D' O4 p3 S8 J+ G

  K' L) x% U! `; \) F6 u% i" l# If you don't know date format
8 }& F% }3 h% u9 E: R) odate2 = parser.parse(d2)# _. J- D( k& E8 Y  t
print(type(date2))  # class 'datetime.datetime'
3 U) Z% |! P+ c! Xprint(date2)  # 2015-01-07 13:33:00. {" h' N1 W- x: W# d

' l' q, R) P, w五、以毫秒为单位获取当前时间! m1 _  K8 K+ l
import time
6 r' h. I! Z  i, ~& a. R9 P. i! |6 T. X# _9 j# P0 r
milliseconds = int(round(time.time() * 1000))
$ J. C9 G, F# L. A- yprint(milliseconds)  # 15163642706506 E' s, W- L2 }8 g! r' z

$ _. ]7 F2 Q0 ]1 |8 z) t* Q7 }+ E六、以 MST、EST、UTC、GMT 和 HST 获取当前日期时间
  G# ^, a" a) L( ?+ y+ ffrom datetime import datetime
4 ?* P) z+ z" i- O9 O! G0 pfrom pytz import timezone) _( s7 c5 D. W" E1 t
% {9 b4 \0 C6 ?4 N1 K. I* P0 N
mst = timezone('MST')1 y' n; v' F, x  E0 X8 D, j
print("Time in MST:", datetime.now(mst))  # Time in MST: 2017-01-19 06:06:14.495605-07:00
, |* Z7 S' G$ `3 ~  l8 ]est = timezone('EST')
; A! n+ ^! {6 vprint("Time in EST:", datetime.now(est))  # Time in EST: 2017-01-19 08:06:14.496606-05:00
8 `) p2 X9 F8 n- nutc = timezone('UTC')
. H3 K0 G" U, ~1 r6 B$ `print("Time in UTC:", datetime.now(utc))  # Time in UTC: 2017-01-19 13:06:14.496606+00:006 f$ L' o+ E. W% k& W9 ?% D3 x
gmt = timezone('GMT')" [) x& ^7 i3 j% y7 c
print("Time in GMT:", datetime.now(gmt))  # Time in GMT: 2017-01-19 13:06:14.496606+00:00. ?/ R) A  C- p: ~6 M2 r3 |
hst = timezone('HST')1 Q8 t7 N2 J9 z! i0 w: n
print("Time in HST:", datetime.now(hst))  # Time in HST: 2017-01-19 03:06:14.497606-10:00
6 s6 K2 ?$ C9 E* ~5 ~% r# v. P5 H. P  X
七、从给定的日期当中获取星期几
8 r- k5 [7 N7 j2 S0 Limport datetime- @0 j0 X. C( a' b$ ~

1 Q2 \) ^0 U% i* M; v- {dayofweek = datetime.date(2010, 6, 16).strftime("%A")
5 h) Z; Q% R8 ^print(dayofweek)  # Wednesday5 j: E" i- F2 \8 \" ^8 ?

' G3 ~( [# g( ^! T- f# weekday()方法: 0代表周一,6代表周日" v) x5 e$ c, u, z3 @- l
print("weekday():", datetime.date(2010, 6, 16).weekday())  # weekday(): 2
* R; I+ X+ z/ b0 m! ~- F# l9 J; A$ l' \% O+ ~
# isoweekday() 方法: 1代表周一,7代表周日
3 }0 [& M' K  V# sprint("isoweekday()", datetime.date(2010, 6, 16).isoweekday())  # isoweekday() 3  H0 i; X4 [& f0 |

6 P+ c! H9 Y+ O7 V1 Y7 d' h6 w9 M$ ydayofweek = datetime.datetime.today().strftime("%A")6 x/ N) Z; o" T4 w' }0 O: l" n3 X
print(dayofweek)  # Friday: f& _  S1 k  [/ S* h% z9 Y
print("weekday():", datetime.datetime.today().weekday())  # weekday(): 4! i' c( D4 _$ e) r: Y0 s
print("isoweekday()", datetime.datetime.today().isoweekday())  # isoweekday(): 5
, |! W3 h+ D1 D0 a" |: D  q$ p; d: }9 |7 b, }
八、计算两个日期时间对象之间的时差
5 Q+ _: c* e" v% |import datetime
( b5 z5 P& U5 E3 A1 y6 p8 gfrom datetime import timedelta
" b* s: \) S8 H5 h
, G& s, e6 }4 N% U3 ?datetimeFormat = '%Y-%m-%d %H:%M:%S.%f'
7 c- M+ E8 d; b( c6 H$ Y3 tdate1 = '2016-04-16 10:01:28.585'
4 n) f1 X0 Y7 n# B# i. O+ f7 Hdate2 = '2016-03-10 09:56:28.067'3 T" G7 \7 Y0 ]
diff = datetime.datetime.strptime(date1, datetimeFormat)\
! c% |% g4 @) ]/ m2 I/ n( _0 U8 _    - datetime.datetime.strptime(date2, datetimeFormat)
* }" r9 U! o0 Z' _( \4 Z' q0 M, b9 b
print("Difference:", diff)  # Difference: 37 days, 0:05:00.518000! w8 m' O& v: z3 m1 ^% m) `- ~8 O/ d
print("Days:", diff.days)  # Days: 37
) S  \( `' U% v  A" Hprint("Microseconds:", diff.microseconds)  # Microseconds: 518000
8 j1 U, h1 |3 j, y, X+ c0 T# z0 f9 dprint("Seconds:", diff.seconds)  # Seconds: 300
) {2 q$ b/ a9 m  X2 m% W& g' z
$ s1 M0 y( \! @: N# `# g九、将 5 分钟添加到 Unix 时间戳
/ H! ]7 }% W* J9 J; Bimport datetime0 \% H8 Y# M! X6 ?6 b/ W
import calendar6 e" u1 z: d& O' c9 S

3 c2 L2 K: g! E. K3 b. Afuture = datetime.datetime.utcnow() + datetime.timedelta(minutes=5)
) k- Q  A$ y" V  F' y6 \print(calendar.timegm(future.timetuple()))  # 16210696199 y6 h0 e4 S/ N& i
' `: e) s% j- J* s7 `1 t- y
十、遍历一系列日期7 Z0 M1 E; c, j; T2 n2 Y" L
import datetime
& q/ I, X  |; [3 ^: \6 |' p* a, f, U$ X8 q) U: x
start = datetime.datetime.strptime("21-06-2020", "%d-%m-%Y")5 D. j6 {0 }7 G
end = datetime.datetime.strptime("05-07-2020", "%d-%m-%Y")' ]" s$ U: `6 ]6 W" v$ u( q9 w( b8 I
date_generated = [start + datetime.timedelta(days=x) for x in range(0, (end - start).days)]
4 Z) P$ q' U- h5 a" r' b' l9 c4 y1 X. P: R3 _5 |5 ?
for date in date_generated:( M+ `* R% P+ B
    print(date.strftime("%d-%m-%Y"))
1 K! ?; a4 q% h$ G" C& [$ M$ b+ b2 S0 l, j
十一、巴黎时间更改为纽约时间  q+ J3 S1 i) W  R5 |9 o" p
import pendulum3 U- g/ P; T6 m' |

* \1 {% m' q% Cin_paris = pendulum.datetime(2016, 8, 7, 22, 24, 30, tz='Europe/Paris')  K% G; s, q+ ~3 k' L
print(in_paris)  # 2016-08-07T22:24:30+02:004 R0 Z8 o' i; K2 F) W, i  W

: T8 r* d  O$ D7 t1 R. Vin_us = in_paris.in_timezone('America/New_York')
+ H; i0 t/ p- o5 W; a6 d+ Lprint(in_us)  # 2016-08-07T16:24:30-04:00+ n& Q0 `1 i) T' d! e
+ t5 ~+ v8 D! ?" b+ B; r4 M! w
十二、使用 Python 获得最后7个工作日
$ J  x+ Y) H* O2 P2 `8 Yfrom datetime import date
6 w7 J0 Z! x- Efrom datetime import timedelta% N% V7 t1 M" p1 |
$ K9 o# D  [; x* f
today = date.today()
' z2 I* E) W8 s# L# l8 c
! w3 A( d* \, c) M- J3 C) l1 D8 Qfor i in range(7):& w" `2 ^5 F5 h
    d = today - timedelta(days=i)$ i: X. u4 K- q" _) \
    if d.weekday() < 5:; d1 x" O2 V. s) [1 R% ^! ~
        print(d)
& e1 _* G1 c' c8 O# i) F/ K& \2 A' S" l+ N  l% V
十三、从今天的日期和一个人的生日推算年龄
6 j' s) [# r6 X( L' B3 Q' x2 `from datetime import date7 M9 h# P+ Z7 \5 ^

( L' g/ U( l/ G* F+ g
2 x+ ?* p; V9 Ydef calculate_age(born):
/ p! F  V) |2 n; D    today = date.today()4 O; {  h' \* q* C
    try:  L+ X, ?; n, ?, q& N
        birthday = born.replace(year=today.year)) k4 Y  I. A; A* @7 S4 f7 g6 d# W
    except ValueError:
7 z  ]( q2 G7 V% j! @        birthday = born.replace(year=today.year, month=born.month + 1, day=1)  ]8 D! @$ ~# q- G9 a
    if birthday > today:$ s( g/ S( |. q7 m% b, z1 m
        return today.year - born.year - 1
4 r  \# ?3 \9 _) h) K    else:! K# m5 M4 W. S
        return today.year - born.year
5 m6 J/ P; u) j( Y' i( _  k7 p. x8 Q+ q1 Q, Y0 a
% \1 Z2 I9 p# W: j
print(calculate_age(date(2001, 3, 1)))
! G  j7 p8 Z  {4 b; s+ s, w& Y2 c1 |9 l( i6 K9 C8 Y  n
十四、获得本月的第一个星期二
4 p+ I6 l2 Y: p  Oimport calendar% L& N6 O- o+ C9 I$ h# l# N! |
from datetime import datetime2 ?) O) Q+ S. f
' C; |! @) M- T
c = calendar.Calendar(firstweekday=calendar.SUNDAY)# o& w  l- T7 R6 R" G! e9 ~
monthcal = c.monthdatescalendar(datetime.today().year, datetime.today().month)3 Z2 C- x1 V- |
#Python小白学习交流群:153708845  " z/ w1 N: s# ~  r
try:1 Y0 y2 c" K, L; p/ X
    tues = [day for week in monthcal for day in week if0 B4 y9 @% I4 {/ a
            day.weekday() == calendar.TUESDAY and day.month == datetime.today().month][0]
% ~8 c- ]/ }# {% T+ P2 r" }8 `    print(tues)' W0 t" U; Q# L7 ]: n# v
except IndexError:' |- M+ S3 H5 j- K  o
    print('No date found')
$ \8 f1 g2 S) W( a+ \- q$ ~6 e7 p
+ a* h( O6 [0 J8 ~十五、将整数转换为日期对象
5 C  ~+ m0 m1 U* ]& I+ T" d& q( t* }from datetime import datetime
+ C5 t  J( C! |( u
% J) Z* \! f, I# \- g* }0 fi = 1545730073
$ S0 V2 A  X2 h, Z/ k, o! Mtimestamp = datetime.fromtimestamp(i)
3 n: e1 K7 R$ t& @& V1 q0 l% u- p2 T. I$ ?0 o7 u+ i1 F& t& D6 Y
print(timestamp)  # 2018-12-25 14:57:531 M, C8 Z9 m3 s" c  O9 y7 Z
print(type(timestamp))
4 [, |; I8 W8 i( R  D8 ~, E2 y( U6 u+ C9 X7 e# c
十六、当前日期减去 N 天的天数1 M' Z7 `( ~& K% E0 e
from datetime import datetime, timedelta$ S4 A5 \* `& |. r8 F0 c3 v/ Y

% v, h2 Z% {- @0 b$ qd = datetime.today() - timedelta(days=5): e3 y( O7 v1 O5 F, q4 w, O5 a1 i
print(d); |/ r% C: ?0 o, H5 @* l% ~6 S

& b! _% z' x. j- d% _" @" n2 j十七、比较两个日期
8 N6 t3 a& @9 [7 Bimport datetime3 x# p( q' O6 X# M/ H# |; e) s( h

# m" h6 s5 r0 X/ Z) ^' ~% na = datetime.datetime(2020, 12, 31, 23, 59, 59)% ~2 U% p8 H' \# x
b = datetime.datetime(2020, 11, 30, 23, 59, 59)
0 ^7 Q! w: @( y; B# a) P$ n. o! h
$ |/ w% o1 u* ]; |3 Vprint(a < b)
* q$ W" ^- n+ o7 a. N5 pprint(a > b)
- v2 [# {) g; y# F
9 s5 G- Q7 w7 ?3 `0 o3 M, _十八、从 datetime 对象中提取年份' ^: ]/ s/ I6 P6 B
import datetime8 C) ?3 w/ I, `/ e3 _
# _0 T) u5 [) S
year = datetime.date.today().year
" o6 r0 H7 e/ eprint(year)
  M/ ~6 @8 k( f" R
3 i1 ^  a# C" \3 m3 l十九、根据日期找到星期几
& j+ s: [# s; N6 R. v4 M1 G3 qimport pendulum0 I6 Z5 s. o' B3 ]/ v# l

5 D: k' z9 j# ?& b+ v$ D) {dt = pendulum.parse('2021-05-18')( F* Z2 M- {' V9 a( p6 d
print(dt.day_of_week)  # 2
1 d9 i2 a0 e( C3 W2 u# o
3 c' R7 q5 \+ H; B9 Z6 Vdt = pendulum.parse('2021-05-01')7 S$ P  l; I7 E3 {# m! x
print(dt.day_of_week) # 6; B- ?: w, A, o2 J$ Q! s. s

8 o5 b+ C$ o: ^% M9 D9 X: ?. Bdt = pendulum.parse('2021-05-21')
8 }; x3 h7 n( D- w) B+ j8 B6 d0 Lprint(dt.day_of_week) # 52 x2 p! i5 @% o$ _2 ]: A$ ?6 Z$ g% o: d
# K+ o3 c- _- D0 \* Y4 S
二十、从当前日期获取 7 天前的日期
. q+ G% F6 D/ v2 W1 z3 H' R% m. tfrom datetime import datetime, timedelta
; n, V' `, J( q$ o0 P3 B3 z) C) u$ Q5 w- P
now = datetime.now()
3 a+ k/ a2 W5 C$ n
* n+ O/ T. B  j0 q% X+ Ufor x in range(7):
& }) [- u$ G2 P1 @    d = now - timedelta(days=x)7 U2 v  y4 \0 J# Q# o" s% R
    print(d.strftime("%Y-%m-%d"))
+ R* l8 o, m8 d5 |. o( @6 {+ t% [+ `* w) }5 B
二十一、将两个日期时间对象之间的差值转换为秒
+ I1 k0 I$ a& X4 c6 ?import datetime% o0 C5 T5 F; L9 ]: h
' h4 G+ v+ J" s
time1 = datetime.datetime.strptime('19 01 2021', '%d %m %Y')" ^  n6 p7 I4 \+ k# _$ B5 B' F
time2 = datetime.datetime.strptime('25 01 2021', '%d %m %Y'): M) h5 U& m  Y: N$ [

& H/ ]) u$ \+ K& d3 M+ Wdifference = time2 - time1  g) G+ l# W" T3 H3 p1 j
print(difference)  # 6 days, 0:00:00
5 j+ a# c' [: p7 ]1 K/ S2 P; E7 N. f
seconds = difference.total_seconds(): X+ \+ D6 G- v. B* g
print(seconds)  # 518400.0
4 F- p7 W! O4 c9 }, M, r0 c
! g6 j( L3 _6 ?+ x  |: M二十二、获得任何一个月的第N个星期五
8 v9 a* T/ ?/ }3 s8 pimport calendar' y( E. C; o: s' k

7 Q& L& K( Z# |# 取2021年5月的第三个星期五/ f) t+ z0 }( R2 G& I
c = calendar.Calendar(firstweekday=calendar.SUNDAY)
  k8 `. e. G2 V! Q4 X. \  p- yyear = 20214 J8 x$ f* \+ ?3 ?- l
month = 56 [; k& u& b1 Q9 l& o) z" m) {
n = 2  # 取第三个
4 F* N0 ]( I5 P2 Q3 O6 I/ Smonthcal = c.monthdatescalendar(year, month)
* f- g! \3 M. X# u% z
2 t$ Z+ R. D9 Y6 U1 v! [1 b! ?) Mtry:/ S4 t2 W* D4 U0 |- U" ?# k* N
    third_friday = [0 ~) U+ ~- E% w& ^( U8 w  O" X- j6 N
        day for week in monthcal + o3 ]( Z9 k3 z
            for day in week if
, T0 X4 ~, a# T$ f9 M- S: Z                day.weekday() == calendar.FRIDAY and day.month == month  \' E8 U) y/ J0 f( {: q
    ][n]4 T+ i. t  y0 k, b# |
    print(third_friday)  # 2021-05-21* _: |6 a. I# P9 c
except IndexError:
' n$ k& \  P/ C( K    print('No date found')
9 N$ C$ c0 p( X0 {4 c) N
8 }+ F8 L( n7 z* {7 F: r" t4 C二十三、根据周数获取日期8 O6 I) U1 m+ [6 \
import datetime" f* j- F8 h% W% ]* n
from dateutil.relativedelta import relativedelta
& p' u! S- y' T
/ ]7 t( c$ c0 g8 Lweek = 25
8 Z) r! b: v4 u2 G2 fyear = 20210 }: B% {: E8 R: v  F* {; W) p. S
date = datetime.date(year, 1, 1) + relativedelta(weeks=+week)% P! G- u3 i$ _% `" ^
print(date)  # 2021-06-25
* Q4 L  p. M# i3 t; I! R
- N6 c( ?' X, L: J二十四、获取特定日期的工作日
/ S0 H& x8 |8 E- E- }: B0 r6 Z' Qimport datetime
. S; D& y& F1 j: z
' s6 @! i: B( `7 ?& }print(datetime.date(2020, 5, 15).isocalendar()[2])  # 50 H& K1 D4 D& N/ \

" a0 N' ]1 p) |+ p二十五、创建一个 15 分钟前的 DateTime
( P# p, N) F" U) Q1 oimport datetime) s" I* \- J; a3 Z( p
#Python小白学习交流群:153708845  3 }: J4 R. m5 t0 I+ b
dt = datetime.datetime.now() - datetime.timedelta(minutes=15)  P5 l2 L+ s: d8 r1 z) @1 q0 z
print(dt)  # 2021-05-15 22:25:55.897365: o( G) V8 w2 B! M% k

9 r3 ?9 Z) a  n. Y' m二十六、从特定日期获取周的开始和结束日期
8 z" }- E$ w" z$ X. g+ W8 ~import pendulum
2 P) O* f- ]" y0 V  w: J9 n; c, J' [
dt = pendulum.datetime(2012, 9, 5)! m. z& f9 f/ J- ^; E

8 {4 j9 R8 ?" V1 K$ }start = dt.start_of('week')
; b+ m7 ?) q0 |7 |$ _) Gprint(start.to_datetime_string())  # 2012-09-03 00:00:00
; m$ p9 Z* x, R/ }- W
1 j( I* T9 \  eend = dt.end_of('week')
. r. Q! d' e# x0 M2 r, x( Gprint(end.to_datetime_string())  # 2012-09-09 23:59:59
& B3 y! l& P4 ~: a# [. N: J% P& H
4 e. Y$ ]4 b) J' r; n: e; C二十七、两个日期之间的差异(以秒为单位)
$ n+ j' ~0 [7 `& O+ c( [0 sfrom datetime import datetime
+ K7 j' v3 F5 ~#Python小白学习交流群:153708845 8 H9 D, g8 `$ n6 ]/ Y. _, D( }% h
fmt = '%Y-%m-%d %H:%M:%S'3 e3 c+ Z! x& x! y' q2 Z; G5 i
d1 = datetime.strptime('2020-01-01 17:31:22', fmt)0 }! [7 Y# `' K! ~
d2 = datetime.strptime('2020-01-03 17:31:22', fmt)
+ ^) L0 \' c* d6 n7 y0 a! M- C7 \: D( R8 b% j* f3 Z9 G
days_diff = d2 - d1
7 g: l& |" c9 Z- iprint(days_diff.days * 24 * 60 * 60)  # 172800
4 {; t5 y$ ~( R8 W' R& ^. M! T7 S' Y& Y8 p' q- k4 A' P
二十八、以这种格式获取昨天的日期MMDDYY* I; x6 ?0 Z# F& b, b9 f
from datetime import date, timedelta1 c( R) S1 b& ^3 T

* X2 {* H; b: Wyesterday = date.today() - timedelta(days=1)) s2 F. w; o* _2 g- \
print(yesterday.strftime('%m%d%y'))  # 051421) Q) ~3 _' ?' R2 Y, u1 G' n

2 }. r. p; V* m( s, k二十九、根据今天的日期获取上周三的日期
) k8 N6 w9 W8 f' P# C1 }1 Z1 ufrom datetime import date
" `- ?4 m" h( t* m# P' ]from datetime import timedelta  I( x9 w" S5 I8 i3 Q* Z! E1 r
% T. \& u2 r* ^
today = date.today()" _5 _3 l: w+ K2 t& l. F3 _
; C0 n6 q' c" a+ a) @) Q
offset = (today.weekday() - 2) % 79 I; t, H: S9 I  y4 b% j
wednesday = today - timedelta(days=offset)
# G5 h6 U/ a6 C! Eprint(wednesday)  # 2021-05-12  G4 E$ U/ {: g' ?

8 X# {& J4 O1 \8 |( {2 G; R三十、所有可用时区的列表打印- X2 t7 g! A1 o9 o2 ?6 T
import pytz" \: E' Q  F- _/ y. l3 |0 W4 u

8 C, Y; y3 m7 b( P7 Yfor i in pytz.all_timezones:2 X# V# @! {! z' c% C- O) m
    print(i)& j# B5 n3 ?  N+ l; U9 u( O
. i9 T% ]7 F* V5 R6 n* \4 T
" J; F" R: [8 d
8 b3 ?* z, p" Z# F5 |: R6 ^
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