! \( t8 ^( T2 S$ Q, C! tfor i in range(7):/ V6 d' {9 D7 t: L
d = today - timedelta(days=i)( h, g8 @* {+ X
if d.weekday() < 5:: n3 [/ o/ j( a# W
print(d)2 ?9 o5 }9 b" U4 G
* Q% h6 A) A( n- v% f8 m7 B十三、从今天的日期和一个人的生日推算年龄6 u; n; v6 S" Z# D. S' u
from datetime import date7 A5 [ r. h3 Q' G6 L, f2 z
+ E" i4 J6 d: P- e: o , m* `' p' l! A- s. z9 Kdef calculate_age(born): # t! g2 E! C. A, X9 b( v- K/ D3 f today = date.today() + [; O" H8 {8 J V/ t- Q# m try: ( @- K: v- I: o" h birthday = born.replace(year=today.year)& M j1 Y' M3 o$ V: F8 \
except ValueError: 3 m- F- g0 n, d. Y; s$ x- r Q birthday = born.replace(year=today.year, month=born.month + 1, day=1)& F# d3 y# U3 r' G8 A) B
if birthday > today:5 O, g% x! j& t7 t5 v8 \8 _7 s# ^% Y
return today.year - born.year - 1 # |' h' [: c H: H& | else:% q/ y7 r+ O% p# I4 I
return today.year - born.year : H1 L7 ?/ K% U Q" ~; ?' v$ \3 Y & n0 i& H# _4 h$ ?3 J # X9 I0 C. I: J, a: o9 _print(calculate_age(date(2001, 3, 1))) x& Q' h+ v- h; y: {; W* |, y u! ]6 E
十四、获得本月的第一个星期二 ! k* }& Q7 }% [4 T4 M7 |import calendar& P- |5 w" D3 n, G
from datetime import datetime% A! q2 M* d+ @7 k
. s' B% w% e- [: x8 Z- @
c = calendar.Calendar(firstweekday=calendar.SUNDAY) # d5 \+ H5 a, c; r8 a0 ]$ Lmonthcal = c.monthdatescalendar(datetime.today().year, datetime.today().month)) j8 p( i# y, t8 s' M4 R
#Python小白学习交流群:153708845 7 l4 ~) R; _) i' K
try: + `& ^" p0 \) n* D# J% J tues = [day for week in monthcal for day in week if7 }5 R8 u+ a5 e
day.weekday() == calendar.TUESDAY and day.month == datetime.today().month][0] - p( Y6 G4 U: ` print(tues)* m9 v9 @9 ]. o/ Z1 f* u
except IndexError: 5 T" Q0 u0 \0 y- N/ e: b6 E- b print('No date found') ) I6 c" w/ y O2 b3 i: Z & T' t7 o1 C0 `* L _$ T, e1 `十五、将整数转换为日期对象5 Z' Q5 [0 {5 U3 F: R4 S
from datetime import datetime0 N3 B/ q5 X w0 Y2 |5 f% t
s7 ~" ^6 B: K6 o
i = 15457300739 m5 g! m3 {2 Y( K
timestamp = datetime.fromtimestamp(i) : V; r1 u6 t6 i. z7 ~" a T5 e! ]( S* T1 | ]( l
print(timestamp) # 2018-12-25 14:57:53 1 k, |7 r2 J2 }7 A8 B. Wprint(type(timestamp)) ! j1 W0 V0 E& K5 K) f7 p7 y% r) N" U7 h0 z& G! m) @
十六、当前日期减去 N 天的天数 # X$ o; N+ F4 E8 x# A5 p# rfrom datetime import datetime, timedelta 9 u t, C( [ s+ f+ {3 h- B2 `% |/ t: ? g( K
d = datetime.today() - timedelta(days=5), V( _; V2 u+ i+ p8 W4 f
print(d) P7 o& K4 j% }0 P # K9 q' d0 O6 [% b- v十七、比较两个日期 ' J& R9 ~- k& e1 R0 r" C7 Cimport datetime* T3 g0 x" V' L. E8 M) y
) Z5 b6 B H5 H8 h1 g% Sa = datetime.datetime(2020, 12, 31, 23, 59, 59)) a) s( |7 U/ b8 m2 Y
b = datetime.datetime(2020, 11, 30, 23, 59, 59). ~& b& d8 _7 H# Y( x- W/ M, c8 \! P) ?
7 }2 P/ w* L2 O' O+ bprint(a < b) - M$ f, b$ E6 {+ {, n' z5 Gprint(a > b)% p* O5 ]6 E8 Y* P* ^& D q
" S% H9 u% E: p. y, h十八、从 datetime 对象中提取年份 " {# u! a* R; i+ J9 l/ t# ximport datetime n9 `: t6 N& d- o- R, E. z/ o% j/ [# ], R5 Q4 S3 E: i
year = datetime.date.today().year $ B1 E6 ^ V- \) \* a' Vprint(year) ) j9 x" f; I' c, {' |7 F" p& E1 L& h: g/ S7 T1 R- q
十九、根据日期找到星期几1 C( J, d% U" t% I3 ^2 Q
import pendulum , v/ _. I2 e$ ^, n) B R8 J+ c; G: ]2 t9 f' F. U
dt = pendulum.parse('2021-05-18') & ? e" P, N2 fprint(dt.day_of_week) # 2 4 x3 f6 v0 U$ T( [8 g* c% d, Y7 l; U) [5 l1 |) O% v8 o
dt = pendulum.parse('2021-05-01')& c7 g- Z0 n/ v& P# k5 Y
print(dt.day_of_week) # 6, D0 S5 c9 T: G, U; l$ {! U
& A1 D0 f% r% S
dt = pendulum.parse('2021-05-21') $ T% f9 ]2 \& rprint(dt.day_of_week) # 5 / Z! z& U3 c4 `' N6 J + L1 s. M7 M. g; ?0 K二十、从当前日期获取 7 天前的日期2 t0 w% s* `4 E$ r$ T# A$ g
from datetime import datetime, timedelta 5 d* w! g+ T0 L7 z8 j3 I . s( i7 n* c# {0 i& onow = datetime.now() 1 [* q8 ^6 r1 g A# w# a* m- B. L0 B; j+ ^/ P
for x in range(7):4 M1 b0 ~) r0 m' y
d = now - timedelta(days=x) : i3 ]% f+ |) K print(d.strftime("%Y-%m-%d")) + H" g4 D6 C6 N; p9 H- C# ]. R8 o% }8 _
二十一、将两个日期时间对象之间的差值转换为秒' i% s% l% |9 a% M+ k1 ?) n+ r
import datetime. j9 V2 ?9 M* v- }
+ c+ ?6 \) s5 m3 F+ L1 p
time1 = datetime.datetime.strptime('19 01 2021', '%d %m %Y')3 Q; \1 P( k/ K, @0 a) C
time2 = datetime.datetime.strptime('25 01 2021', '%d %m %Y') # k3 N7 b7 o! G* S# g/ h2 G " ~# Q/ l4 [$ v2 e) ` d: }+ Ddifference = time2 - time1- d7 O! _+ c# P8 d7 d
print(difference) # 6 days, 0:00:00 # ^: U6 p! a7 [$ q; a8 J7 \ + y2 g ~& @. b5 e& a6 b- ~seconds = difference.total_seconds()( J1 c6 {% G0 o1 A) E
print(seconds) # 518400.0* D6 a5 W$ h- a* M
# j) l/ }. f2 L
二十二、获得任何一个月的第N个星期五 " ~. O/ g f* aimport calendar G2 A6 Z, l) {5 { ) t1 _. M4 P! s, s* Z) \5 `# 取2021年5月的第三个星期五 4 j( _& y/ D$ c! ^8 ^c = calendar.Calendar(firstweekday=calendar.SUNDAY) . T6 ~% V+ ^8 _6 e+ _2 vyear = 2021# H+ x+ W2 s% N: {
month = 5& o% G/ e4 H& L7 H' N; x8 M
n = 2 # 取第三个 % ]9 b; T) V: S, l+ ymonthcal = c.monthdatescalendar(year, month)( @' n# z$ h3 S, H" t4 Z
3 A$ X2 K4 e* n# M! C
try: 0 y6 n# R% [: i m# ?* G third_friday = [. U# j. M0 I; _& O( Z1 N; \6 h
day for week in monthcal 1 s( t5 e4 L* F* @ for day in week if' H1 o) U! O' [- S! N. n Y f
day.weekday() == calendar.FRIDAY and day.month == month " f1 j7 W) j9 c+ Z+ ?7 M) L* e) M ][n] ) F) G' d1 }' q. n! `2 N7 z4 ? Z) I6 Q3 f3 Y print(third_friday) # 2021-05-21* v* Y9 @$ ~2 M# m! c) `* Z
except IndexError:) H- B9 i- u- H. t& w
print('No date found')/ Y& ~# K1 z3 \0 y$ F" m
, B& |0 L ?# E6 E4 S$ y6 l
二十三、根据周数获取日期 ; v1 W: @+ N3 m p. `) E' L3 W) simport datetime: {+ [5 J' E0 l1 a$ \) _+ W' b% s
from dateutil.relativedelta import relativedelta , M' r& T; T2 M+ A ' h- |; S3 q! ^0 X3 Rweek = 252 k1 T v6 c- g) N% ~0 n! f
year = 2021$ k9 r) E9 |0 ^
date = datetime.date(year, 1, 1) + relativedelta(weeks=+week) - J! ~& d7 x* ?+ xprint(date) # 2021-06-25. A3 H9 v; K6 Y3 R) V0 s5 o0 j
" W: n+ _7 e6 E) }
二十四、获取特定日期的工作日& l# {' k, }$ H6 T) b( T
import datetime 9 R2 z0 @1 f: U/ r0 W3 B/ A- f2 G8 k/ }5 v) f I3 T
print(datetime.date(2020, 5, 15).isocalendar()[2]) # 5+ p. ^ v" ?5 ?' J0 P% Y: P1 }! ~
5 F; o# \4 t! ^9 X
二十五、创建一个 15 分钟前的 DateTime ! r- q* n9 g! o3 m) ]6 b7 qimport datetime5 J; q& ]& A+ s5 }$ m" u2 F8 m0 h
#Python小白学习交流群:153708845 4 V0 \ b4 N2 v: @/ Q2 Q @dt = datetime.datetime.now() - datetime.timedelta(minutes=15) ' \. H% h: B2 O0 L& Cprint(dt) # 2021-05-15 22:25:55.897365 ' Q q# V* G% S L0 t ! W( B0 x2 P% m2 O: S& w7 m* r) A二十六、从特定日期获取周的开始和结束日期, P; L3 [) N; b- J) p
import pendulum9 j+ S4 f& t" j0 u