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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
# j; f( Y  h# }8 P0 y# M+ O+ Dimport time: m: J* }; ^' s4 @* e3 H
from time import gmtime, strftime" K5 x; ]2 h3 @5 H& M

" Q; m" p5 {8 m3 O5 K. tt = time.localtime()  ( t9 L* T. D6 B  i
print (time.asctime(t))  # Sun May 7 09:30:37 2017: P) H! G. r( M6 D  j9 {! m
print(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()))  # Sun, 07 May 2017 04:00:37 +0000
) E, Y- Y+ n- y" Qprint(strftime("%A", gmtime()))  # Sunday
6 M: V3 Q# m, t. |$ T$ Rprint(strftime("%D", gmtime()))  # 05/07/17
. I1 {2 l: d) Y7 J1 R3 S- wprint(strftime("%B", gmtime()))  # May+ |9 j- g' C! c: J: \) P5 `2 K
print(strftime("%y", gmtime()))  # 17' L0 P; \0 q+ R+ Z( g

' X$ [" v0 g. C2 C$ x' y) R# Convert seconds into GMT date
& T, x' W) C4 p( B* }5 G. lprint(strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime(1234567890)))  # Fri, 13 Feb 2009 23:31:30 +00003 V+ D. a3 F/ F

4 w# S1 [  e4 Z二、将天、小时、分钟转换为秒/ b; u' _( C) B0 |8 _' E# m2 _
SECONDS_PER_MINUTE = 60
) z5 m/ y: j' T# ASECONDS_PER_HOUR = 3600$ f+ I2 Q& ~$ |) b% \
SECONDS_PER_DAY = 86400
8 t& K: O4 g! y% l9 [/ t+ ~6 A& \) ~! R3 N7 q: A; {7 M
# 输入天、小时、分钟、秒的数量& q4 t1 \: P8 y9 @6 `2 p/ U
days = int(input("Enter number of Days: "))
7 z" C+ N! Z* ?; h0 }" \  Bhours = int(input("Enter number of Hours: "))2 O0 {4 D0 w  d, \, d# s
minutes = int(input("Enter number of Minutes: "))! I. J7 F, H5 _( B1 R% J
seconds = int(input("Enter number of Seconds: "))$ }" W/ `" C7 p, L

$ Q: Z: f2 A: L) ~5 }, r0 v# 计算, e1 E8 I3 G# y! Q- n3 p
total_seconds = days * SECONDS_PER_DAY5 u4 C* Q% i, h1 s: O
total_seconds = total_seconds + ( hours * SECONDS_PER_HOUR)/ Y2 d( F1 E/ M: s
total_seconds = total_seconds + ( minutes * SECONDS_PER_MINUTE)2 h1 f7 H9 U/ ^
total_seconds = total_seconds + seconds  W& T+ I6 }/ W8 @" t/ @

4 p: `$ w) s" E! d' W) F# 结果% l/ B, g- W/ ]6 |6 ^, K9 l! o
print("Total number of seconds: ","%d"%(total_seconds))
% j! l5 A+ s+ w4 C'''
# ], L. L( }4 {7 IEnter number of Days: 54 C+ {1 b9 p# |9 F4 |2 O* f
Enter number of Hours: 36% v% j8 n. h  Z% Y+ Y4 W( ]
Enter number of Minutes: 24
  m5 w0 f* y9 I/ i4 J! Z! \Enter number of Seconds: 15( Z0 s2 p+ G; r! C) z1 |
Total number of seconds: 5630558 Y& P3 O, w) @* l* f3 }
'''
% N5 Z, |) {! E: `' f& y
3 W% Q) w5 t" k三、使用 Pandas 获取当前日期和时间
% N* M' ]" u* h: bimport pandas as pd2 }& J5 N, K  H& G  Z4 O
print(pd.datetime.now())  # 2018-01-19 16:08:28.3935536 Q% j4 o! v( y; p; K
print(pd.datetime.now().date())  # 2018-01-19& _1 z6 F8 W9 d" X, g
print(pd.datetime.now().year)  # 2018
& o( y5 n9 M" r/ W. u: b, o- Pprint(pd.datetime.now().month)  # 1
3 u: [* d" J# Z9 C; M1 r' E1 ^print(pd.datetime.now().day)  # 19
2 V1 B; E# K4 W8 Zprint(pd.datetime.now().hour)  # 16/ V8 }: T& q8 L( W
print(pd.datetime.now().minute)  # 8
& Y7 z" l( H2 I# o' g6 Nprint(pd.datetime.now().second)  # 28$ y; h/ f: J8 J2 Q
print(pd.datetime.now().microsecond)  # 394553
" ^/ N" j3 w0 H% }2 O- J/ s0 N( e
四、将字符串转换为日期时间对象! `0 E9 E' t- m
from datetime import datetime5 ?0 M1 ^" T% M6 t
from dateutil import parser+ v$ a4 v5 {7 d8 s. z: Z* J

9 D% b: h, q% q% o. }; |3 a( id1 = "Jan 7 2015  1:15PM"
2 j# v+ s, R% y1 ?2 Md2 = "2015 Jan 7  1:33PM") J# j; D" F8 X, [! y

4 l' x( l3 M$ G, X; {1 j& \# If you know date format
: I* p7 t+ r. Sdate1 = datetime.strptime(d1, '%b %d %Y %I:%M%p')
! R' U! a  G. c! \2 L6 F$ @0 bprint(type(date1))  # class 'datetime.datetime'
# B6 w9 [, p# ^8 |, ]! f* V3 X. oprint(date1)  # 2015-01-07 13:15:00, O. n% i( p/ U; T" n3 n
& `, ?' }8 B% X6 q! g
# If you don't know date format* b3 ?3 q6 s* j  W+ Q, G
date2 = parser.parse(d2)% p6 c  a$ T8 o, ], M
print(type(date2))  # class 'datetime.datetime'
4 r7 H6 d1 d& Rprint(date2)  # 2015-01-07 13:33:00
% @( K/ ?3 R1 m% `
- A5 F- P- n6 e8 N* e$ M( h五、以毫秒为单位获取当前时间
: P) s- D! ^7 @" ?% oimport time$ x4 x7 z% `+ X' b2 C( [9 J

0 X. V! J  c0 t' E" ?+ |' ymilliseconds = int(round(time.time() * 1000))
% `3 C. E3 I& n0 E6 n5 ]print(milliseconds)  # 15163642706507 ^& Y) y. `4 I9 V

- j5 p8 y) w# Z% }( X- p9 L! H六、以 MST、EST、UTC、GMT 和 HST 获取当前日期时间
2 j' O3 y4 K0 o# r' z" Lfrom datetime import datetime( g3 X$ i$ B/ b- [! E5 v3 ~
from pytz import timezone
+ C! K$ e2 p& H2 N/ T" B& g" s, r8 r
mst = timezone('MST')3 K* d2 |. L4 l( b3 i& q
print("Time in MST:", datetime.now(mst))  # Time in MST: 2017-01-19 06:06:14.495605-07:005 [* h# X, _0 k7 R& b4 j, a
est = timezone('EST')
4 o! t. x5 o9 l7 F2 F, u. lprint("Time in EST:", datetime.now(est))  # Time in EST: 2017-01-19 08:06:14.496606-05:00
4 c# x$ h. G0 y: y! putc = timezone('UTC')& R. m4 f! q' j
print("Time in UTC:", datetime.now(utc))  # Time in UTC: 2017-01-19 13:06:14.496606+00:00$ N8 \5 O6 [6 r2 H8 L
gmt = timezone('GMT')' g3 f# D1 Q0 B6 {" J, N9 \, v6 P- N
print("Time in GMT:", datetime.now(gmt))  # Time in GMT: 2017-01-19 13:06:14.496606+00:00
1 P8 z& v+ c/ W  ~7 }hst = timezone('HST')
  N3 j! G, n- N# M2 Vprint("Time in HST:", datetime.now(hst))  # Time in HST: 2017-01-19 03:06:14.497606-10:00! I  {/ v4 A8 p# J. w; e0 @7 ]

2 s6 c  _5 n8 l6 H$ \# l' z七、从给定的日期当中获取星期几7 ]* l4 a7 Z$ E1 d
import datetime. q& u" ?/ _+ h. e
% ?$ }' Q: B8 g  J* u" ]
dayofweek = datetime.date(2010, 6, 16).strftime("%A")
" z8 Q1 M- T2 q: i) n8 }print(dayofweek)  # Wednesday4 ^2 _5 X5 u) G! x. V) e- a/ W" I

7 n- w# E7 I1 h) O# weekday()方法: 0代表周一,6代表周日
. r9 X9 I- O( {9 bprint("weekday():", datetime.date(2010, 6, 16).weekday())  # weekday(): 2
% H) i3 z1 A( t- e  o& }
( }2 g0 A/ o: F- v$ Y' p# isoweekday() 方法: 1代表周一,7代表周日
9 ~+ D) |* I7 f4 U4 O3 bprint("isoweekday()", datetime.date(2010, 6, 16).isoweekday())  # isoweekday() 3
8 Q4 `' \6 \5 y4 `) t7 F$ `; i+ p% d
dayofweek = datetime.datetime.today().strftime("%A")# j* v# ^' o4 ~% s! ^
print(dayofweek)  # Friday1 Z: {/ s: l" E0 ?
print("weekday():", datetime.datetime.today().weekday())  # weekday(): 4
7 B9 H6 n7 K% gprint("isoweekday()", datetime.datetime.today().isoweekday())  # isoweekday(): 56 |8 T7 l7 k6 X  J  A6 l' I7 t
4 o! x- g, f5 Z9 u) t2 R' ]
八、计算两个日期时间对象之间的时差5 ~. p7 I" n4 ^
import datetime
: W0 @' M8 B  e! D, bfrom datetime import timedelta9 Q$ ?4 g/ M: H. s$ B/ M

6 U6 A7 h) j$ MdatetimeFormat = '%Y-%m-%d %H:%M:%S.%f'# Y# }' E$ c8 c5 `* U
date1 = '2016-04-16 10:01:28.585'
  B# K( `9 c  C; U/ e5 T" Xdate2 = '2016-03-10 09:56:28.067'8 f$ V; d; M6 ^
diff = datetime.datetime.strptime(date1, datetimeFormat)\
) _/ s1 `+ X) E# n5 n% [4 {    - datetime.datetime.strptime(date2, datetimeFormat)
9 i/ _8 o9 a5 o8 w- G$ d3 w0 ?, b* H& c, V+ }& U
print("Difference:", diff)  # Difference: 37 days, 0:05:00.5180009 v6 u/ W2 J7 W" p
print("Days:", diff.days)  # Days: 372 }+ D3 t5 u% Y, b
print("Microseconds:", diff.microseconds)  # Microseconds: 518000! B! T; H6 Y. t" S) a# [! p
print("Seconds:", diff.seconds)  # Seconds: 3003 J$ V4 A- p" Z( B" I

+ K& l# Y& `1 S4 K" R3 d: N九、将 5 分钟添加到 Unix 时间戳' ~( a$ ?: p- Y4 M; U
import datetime
# {' I0 ]7 G/ g0 N) Oimport calendar
, ~( j2 ?: [! D2 F9 [) J% r
8 g( U* C- V& S, m' ?3 y( b) q* ofuture = datetime.datetime.utcnow() + datetime.timedelta(minutes=5)7 H, {9 @! B! A* L( y% B& }8 A
print(calendar.timegm(future.timetuple()))  # 16210696195 X7 Y4 j+ ^. K/ y
5 t" a; y, R1 \0 U$ r) D8 r
十、遍历一系列日期
: U1 }$ R; U6 l  h8 @$ |" ?: d! }import datetime; F9 E2 H. H! t1 k2 O! e+ o$ R

; M4 x8 R1 H- c! Nstart = datetime.datetime.strptime("21-06-2020", "%d-%m-%Y")$ ?( v* g, s7 b5 x$ j
end = datetime.datetime.strptime("05-07-2020", "%d-%m-%Y")
/ W4 ]+ I# w1 W4 f/ _+ G6 E' q/ zdate_generated = [start + datetime.timedelta(days=x) for x in range(0, (end - start).days)]
1 ]& q# I0 y' }9 m. ~: q. k/ e% ]* A; f& q4 d/ K
for date in date_generated:# `' }  Z& D) E2 |0 Z; b8 P
    print(date.strftime("%d-%m-%Y"))$ x; J6 w* W- r& C
3 X+ l5 _9 w: k( \
十一、巴黎时间更改为纽约时间
. j8 F' k: A* U: e2 {' [& simport pendulum0 W2 h! E& k; o: j# [& R0 B

! U( j# X  s6 C; R; o+ z" O( Nin_paris = pendulum.datetime(2016, 8, 7, 22, 24, 30, tz='Europe/Paris')
  Q  L5 S! S* ]' p& M1 {6 k. Dprint(in_paris)  # 2016-08-07T22:24:30+02:00- L7 G& W' s; {$ [6 @, W

, P: o) H/ O, i0 H2 gin_us = in_paris.in_timezone('America/New_York')& d# Y3 o: A8 @4 D7 V
print(in_us)  # 2016-08-07T16:24:30-04:00" W- H0 W7 x  Y3 B

- U" z$ q! j+ u8 j. Y% D2 P/ j5 X十二、使用 Python 获得最后7个工作日
$ _7 X  i7 r7 P! ?; P& D2 l% T' _from datetime import date
( C" ?( l2 I4 V7 d6 b$ Efrom datetime import timedelta7 L: A+ @8 P- i- p$ Y

3 h4 N5 G, W, R% D( i0 \today = date.today()
1 Y) i. r# T) @! l  B; L3 n* ?) e9 T
for i in range(7):
* d$ ]$ @. t: k$ o( M    d = today - timedelta(days=i)
( c/ Q; f# M# D    if d.weekday() < 5:! [2 n' L" u- h2 g- m5 T3 ^/ v
        print(d)& l% u: G& U" s9 r. h3 g# j
. M1 ]1 e+ ^' ^& N9 P
十三、从今天的日期和一个人的生日推算年龄. \, B, X: B! |3 ?- a. `
from datetime import date; z' \1 B& V# u" E9 ~

, Y4 T4 R$ J3 E  ?# U+ Z& S5 [: n' ]) Q( U4 b* e
def calculate_age(born):9 _# W6 P0 _6 E" u2 p) V
    today = date.today()
% B1 o" X. A1 y    try:" K3 {$ B- n. U$ @/ A0 v0 `0 e, y$ w
        birthday = born.replace(year=today.year)7 I$ r9 y7 ^# w* S- K
    except ValueError:
; w1 T* D# n; U; K' |) F/ W9 n        birthday = born.replace(year=today.year, month=born.month + 1, day=1): k6 v7 S# \" u5 V
    if birthday > today:; n! Q# p( ]- t3 N1 {
        return today.year - born.year - 1# h4 U- g( @( D& L! [3 z4 r) z
    else:$ I% L3 l  b. f5 P
        return today.year - born.year, ?( Z! ^; Y" b- C9 d' [
- P  c/ J. @  C5 n; Y. c

; w; x( f) t( u- k* Nprint(calculate_age(date(2001, 3, 1)))2 b/ h) X6 c- m3 J7 D4 J6 T
/ \' p8 f6 u# q( ~1 h2 |, p: y& n
十四、获得本月的第一个星期二
9 t4 G4 g- I( ~1 O+ F* q. [( h/ {. ^import calendar* @1 l) u9 g$ L& _3 }; w
from datetime import datetime  k& y& s5 w1 w) f5 }; X
3 [! o2 x* I$ O( u3 \: N+ b4 N# R
c = calendar.Calendar(firstweekday=calendar.SUNDAY)
$ C2 W1 B/ P1 {' `+ s/ _4 n% S5 |- smonthcal = c.monthdatescalendar(datetime.today().year, datetime.today().month)
: {- b' C# @! `% `) `#Python小白学习交流群:153708845    p: M( G  K& m, `: ?+ x8 N3 l, w
try:8 y0 T4 [* [( P: |& I/ h
    tues = [day for week in monthcal for day in week if) B" \8 a3 ~2 n/ i
            day.weekday() == calendar.TUESDAY and day.month == datetime.today().month][0]. x) I) q/ h! V- g$ U
    print(tues)
4 S( u' b3 B3 J3 b. yexcept IndexError:
0 a6 X7 A2 T9 G* w" C) G( M    print('No date found')% S( ]$ c' u* ]1 A" `
2 V9 {2 e, C% ~  T1 k% n# _8 q
十五、将整数转换为日期对象  M7 z( J/ C' }, D6 K7 ~
from datetime import datetime
0 b* V0 [+ a6 B+ |' f6 }2 u/ d! p6 l! ]: w, k6 c
i = 1545730073
; N# B& t* z# r: O8 U; `; ~8 Itimestamp = datetime.fromtimestamp(i)
/ c7 q5 C4 q- U9 T# r( w2 N8 M/ M
  f# v, O4 [- h: Oprint(timestamp)  # 2018-12-25 14:57:538 U5 S3 U* }9 t4 ^' E. ^
print(type(timestamp))
; r" ^1 T8 I( d1 s3 D' z5 `# y3 Z2 L8 p& W
十六、当前日期减去 N 天的天数9 }" X, G8 c2 t" t# B) b
from datetime import datetime, timedelta
! ^9 E: }$ @5 T$ h* n; ^9 k, b# U: p) u. Q4 i; z
d = datetime.today() - timedelta(days=5)5 d! q/ @" }0 V0 d: R
print(d)
  E: x0 _& w  b: K! `
" w. A7 Y$ `- p. j7 Y/ N  q5 w# G十七、比较两个日期' o$ x; a7 M( t
import datetime
2 V/ _; f$ j8 D/ M0 v  K" g/ H, f+ V8 D0 x
a = datetime.datetime(2020, 12, 31, 23, 59, 59). J' x0 b  G& H
b = datetime.datetime(2020, 11, 30, 23, 59, 59)
' R$ ]1 A9 M* `
! ~, U! p, h% \- ?& H2 p2 _print(a < b)/ }3 e% m* `) \1 Z
print(a > b)
" {; k: \; C( e8 m; B$ c: y7 g, i  v# T- ?0 G
十八、从 datetime 对象中提取年份
- m9 q* }, c( o  ?8 ~import datetime& \' H: S9 E( W* \/ F% ^
" o8 P/ Q5 V2 q5 V( K
year = datetime.date.today().year/ V6 ^; Z" o8 d0 t( C! }& f. f
print(year)% l0 ~/ V7 P3 f: }0 c
; i- g( I; @* ^) @. c
十九、根据日期找到星期几
( \6 @/ C! X) \3 k" N# Z" a9 Q% Oimport pendulum; w" A6 k+ R) R+ V& c- N. T
" S+ R* f# Z: f; k+ i7 H) b# @
dt = pendulum.parse('2021-05-18')0 z4 z% \, {" n% @; C$ o
print(dt.day_of_week)  # 23 G9 z! o5 @% l
5 z' r. E+ b* t& C
dt = pendulum.parse('2021-05-01'): o8 X' f; l& k- T) u
print(dt.day_of_week) # 6
) G5 B  n( B2 K+ ^9 ?( ]
2 G* r- N1 C( b$ Idt = pendulum.parse('2021-05-21')  q- \( }8 z6 j5 A- `6 U
print(dt.day_of_week) # 5
1 J4 }2 r; b2 H1 P
' M1 w) |* }( V. Z二十、从当前日期获取 7 天前的日期! ~5 M; ~0 c+ i3 |- Y1 E1 n0 s
from datetime import datetime, timedelta
! F% ^* y$ p8 o3 \; @1 e; Y) g
* g  M# v2 y3 D+ ^- V! U5 k6 a8 Tnow = datetime.now()
# |# ?" H6 C! }. c' |5 P! Q/ F; I( m
for x in range(7):
, `: a/ Z+ m+ c$ P- L) U    d = now - timedelta(days=x)
9 @7 M8 v  f. Q! [$ M/ |' K( g    print(d.strftime("%Y-%m-%d"))* B* Y9 i$ z2 D, H2 i, ?) ~% l9 I
% `& e% o/ |$ h
二十一、将两个日期时间对象之间的差值转换为秒7 q# \8 R8 j* G
import datetime
! s% m) k* v9 X5 A8 H: B7 {/ l8 X0 C- j8 x, A
time1 = datetime.datetime.strptime('19 01 2021', '%d %m %Y')
2 z5 }' c1 P+ d2 P- [( Z% z5 Rtime2 = datetime.datetime.strptime('25 01 2021', '%d %m %Y')) |  p! ?, u/ O

) B8 ^9 T8 U; z0 y* |9 n9 |difference = time2 - time1( {8 H$ U) h$ k- ^# |! t' {8 ~
print(difference)  # 6 days, 0:00:00+ i! }1 U2 J- I) r" t

" B0 o. D& b0 x2 L3 T8 zseconds = difference.total_seconds()
0 ?$ ^: ?/ V3 ]! T" ]3 m4 rprint(seconds)  # 518400.0
6 M5 P1 N' U  [  r8 q
/ r1 b! e% t$ w  r+ w* h: [1 i二十二、获得任何一个月的第N个星期五4 m  T! q/ ?. u' e: }
import calendar; l( N+ g# [) [  E& V

9 U) Z! Y. G7 m6 k6 W8 p7 e# 取2021年5月的第三个星期五% U" K( g2 h4 I( a& V+ ?+ w+ [
c = calendar.Calendar(firstweekday=calendar.SUNDAY)1 N1 \% v7 B  f% F& K7 Y
year = 2021( h. P* Y! q% V1 U% e8 D' S7 ]" S
month = 51 L: h% Y" n2 H' `% a$ u
n = 2  # 取第三个  {% {$ ?7 o& p) H" H
monthcal = c.monthdatescalendar(year, month)' `7 N$ v) z% h/ ^
# o' [5 B: W9 L
try:
, D( K3 P0 Q( F# B' e    third_friday = [
8 f! R5 R( o% j* y  j        day for week in monthcal . I5 i$ F) m. {* B1 M6 z  B
            for day in week if
! W* m6 @! P) H3 h& Y5 l. v                day.weekday() == calendar.FRIDAY and day.month == month! l; J4 O" B9 |2 J- k2 x+ Z
    ][n]
6 W% H3 k. ]7 R" L) p2 d$ h    print(third_friday)  # 2021-05-21+ t+ d4 u* u/ B% ^; Y
except IndexError:
; h4 h- W  J8 T( b( O# x" d, _    print('No date found')
1 |4 \5 W0 g+ O. P7 J
- y2 t! y; Q* T7 d5 \6 i二十三、根据周数获取日期$ L. W9 I& g  a% i( o/ p
import datetime2 ]3 z4 n; \+ i/ r6 v
from dateutil.relativedelta import relativedelta
5 ~! O# ^! Y* K7 O
9 n" l1 K2 ]- Z# f) g2 O8 Pweek = 25- L2 b: P6 B: ]4 W$ B4 [
year = 2021; l) O. X! t" s
date = datetime.date(year, 1, 1) + relativedelta(weeks=+week)
, i) {/ t* r% L( B. }print(date)  # 2021-06-258 A1 L; }" G9 _& T- X4 _$ z6 y% ^1 @; C

& D& T- z8 s9 f2 Y7 T0 n二十四、获取特定日期的工作日" c8 `1 w/ O+ [, k3 y, T
import datetime2 v) |7 r1 I8 K2 p3 {, d) W
' N% _7 Z0 X: ]3 O/ }- P/ n
print(datetime.date(2020, 5, 15).isocalendar()[2])  # 59 P6 v" T' ~2 G0 B7 ^
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二十五、创建一个 15 分钟前的 DateTime" n1 o4 F, m3 b0 A" T
import datetime
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0 N# w. A% i9 e' Z# o- g2 Idt = datetime.datetime.now() - datetime.timedelta(minutes=15)
( m( R; }* D; Z3 s$ `! Lprint(dt)  # 2021-05-15 22:25:55.897365) ^7 h; X+ f$ q( C0 r$ m7 n
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二十六、从特定日期获取周的开始和结束日期
: L9 |8 l/ ~" K* `# K  Jimport pendulum" r8 Q9 Y, q: Y" {
4 u( H! M+ }9 t* o
dt = pendulum.datetime(2012, 9, 5)
  S1 |0 W; u8 O% [5 u0 Q1 o! {; }: R1 L% t$ e' y: T
start = dt.start_of('week')
$ Q9 X3 S: H8 B' }8 w$ D  R0 ?print(start.to_datetime_string())  # 2012-09-03 00:00:00* U8 y$ i0 z# w$ q7 x* L3 L
/ c. p1 ^5 V0 k5 e* {
end = dt.end_of('week')5 U5 ~7 t3 T/ S. |) H/ |2 ?. z
print(end.to_datetime_string())  # 2012-09-09 23:59:59
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3 G5 d$ I# q7 n8 a" `二十七、两个日期之间的差异(以秒为单位)
* _- E! M% P8 g. l; v: Yfrom datetime import datetime
$ [* N- f  F5 _- c#Python小白学习交流群:153708845
7 ^  T* P. r0 z" s  _/ P! K) ifmt = '%Y-%m-%d %H:%M:%S'7 @/ G! {' M; k+ K
d1 = datetime.strptime('2020-01-01 17:31:22', fmt); n7 b0 F) K7 K# L* p1 Y! g0 o
d2 = datetime.strptime('2020-01-03 17:31:22', fmt)
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) _8 V+ j: {" w" ^7 {  c* ddays_diff = d2 - d16 ^( Q+ g  s+ C% B
print(days_diff.days * 24 * 60 * 60)  # 172800) S4 ]$ C. H3 {- F5 @3 P

& R1 b$ b& b0 |' M- C% D二十八、以这种格式获取昨天的日期MMDDYY& |' r& t% P4 y; \
from datetime import date, timedelta5 o! n' J0 m6 R  l2 }' V; u5 S2 T

/ ~* W1 }0 k/ Y& N, iyesterday = date.today() - timedelta(days=1)
6 s' y+ p  b) ^- Pprint(yesterday.strftime('%m%d%y'))  # 0514212 y9 O" ?4 e2 x: A4 d" d

) m* d8 g0 P2 S2 j  U二十九、根据今天的日期获取上周三的日期" j, i& {2 P+ Y- _6 L
from datetime import date
! h9 ]/ k, _! ~, ufrom datetime import timedelta- Q/ k. {' z2 a* J9 q0 g- a* V" J$ h6 d
$ m9 n9 c. _. w/ |, o
today = date.today()
7 ?9 m1 Z, `/ Q
0 J& ~- D! v* @3 U3 aoffset = (today.weekday() - 2) % 7
" m2 x% K& t# \3 _. n0 o# w' Hwednesday = today - timedelta(days=offset)
2 o4 z& C- U! u/ U2 o4 Tprint(wednesday)  # 2021-05-12
7 J( K, B5 m. `# `. t1 g, n1 `) s# y+ q  A% X
三十、所有可用时区的列表打印8 h$ P/ f" G- ?/ c
import pytz5 Z4 A+ u$ b$ ]8 n
+ r9 `) ?# E( t2 v' {4 g
for i in pytz.all_timezones:3 ]# R4 B( |$ D" A4 E
    print(i)
6 I8 b7 b$ f- b5 X' R: K4 J
, P# J' \* k' ?9 \; {# o. _
/ C6 I) ]: C% B4 s# D1 ?$ [4 A( w* i) ~# F) m) j3 ^* B
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