Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

Commit3eaf027

Browse files
committed
datetime: Optimize for code size.
Optimizations applied here are:- writing once-used helper functions inline in their place of use- writing once-used constant tuples inline in their place of use (I would have used `from micropython import const` but that renders the code not runnable under CPython for testing, and also increases code size itself for the import)- renamed _tmod to _t- renamed _format to _fmt- optimised timedelta._tuple() slightlyReduces datetime.mpy by: 8897 -> 8728, so saves 169 bytes.Signed-off-by: Damien George <damien@micropython.org>
1 parent656f420 commit3eaf027

File tree

1 file changed

+31
-40
lines changed

1 file changed

+31
-40
lines changed

‎python-stdlib/datetime/datetime.py‎

Lines changed: 31 additions & 40 deletions
Original file line numberDiff line numberDiff line change
@@ -1,37 +1,22 @@
11
# datetime.py
22

3-
importtimeas_tmod
4-
5-
_DBM= (0,0,31,59,90,120,151,181,212,243,273,304,334)
6-
_DIM= (0,31,28,31,30,31,30,31,31,30,31,30,31)
7-
_TIME_SPEC= ("auto","hours","minutes","seconds","milliseconds","microseconds")
3+
importtimeas_t
84

95

106
def_leap(y):
117
returny%4==0and (y%100!=0ory%400==0)
128

139

14-
def_dby(y):
15-
# year -> number of days before January 1st of year.
16-
Y=y-1
17-
returnY*365+Y//4-Y//100+Y//400
18-
19-
2010
def_dim(y,m):
2111
# year, month -> number of days in that month in that year.
2212
ifm==2and_leap(y):
2313
return29
24-
return_DIM[m]
14+
return(0,31,28,31,30,31,30,31,31,30,31,30,31)[m]
2515

2616

2717
def_dbm(y,m):
2818
# year, month -> number of days in year preceding first day of month.
29-
return_DBM[m]+ (m>2and_leap(y))
30-
31-
32-
def_ymd2o(y,m,d):
33-
# y, month, day -> ordinal, considering 01-Jan-0001 as day 1.
34-
return_dby(y)+_dbm(y,m)+d
19+
return (0,0,31,59,90,120,151,181,212,243,273,304,334)[m]+ (m>2and_leap(y))
3520

3621

3722
def_o2ymd(n):
@@ -73,7 +58,7 @@ def total_seconds(self):
7358

7459
@property
7560
defdays(self):
76-
returnself._tuple(2)[0]
61+
returnself._tuple(1)
7762

7863
@property
7964
defseconds(self):
@@ -145,17 +130,17 @@ def __bool__(self):
145130
returnself._us!=0
146131

147132
def__str__(self):
148-
returnself._format(0x40)
133+
returnself._fmt(0x40)
149134

150135
def__hash__(self):
151136
ifnothasattr(self,"_hash"):
152137
self._hash=hash(self._us)
153138
returnself._hash
154139

155140
defisoformat(self):
156-
returnself._format(0)
141+
returnself._fmt(0)
157142

158-
def_format(self,spec=0):
143+
def_fmt(self,spec=0):
159144
ifself._us>=0:
160145
td=self
161146
g=""
@@ -201,8 +186,8 @@ def tuple(self):
201186

202187
def_tuple(self,n):
203188
d,us=divmod(self._us,86_400_000_000)
204-
ifn==2:
205-
returnd,us
189+
ifn==1:
190+
returnd
206191
s,us=divmod(us,1_000_000)
207192
ifn==3:
208193
returnd,s,us
@@ -241,7 +226,7 @@ def fromutc(self, dt):
241226
returndt+dtdst
242227

243228
defisoformat(self,dt):
244-
returnself.utcoffset(dt)._format(0x12)
229+
returnself.utcoffset(dt)._fmt(0x12)
245230

246231

247232
classtimezone(tzinfo):
@@ -276,7 +261,7 @@ def dst(self, dt):
276261
deftzname(self,dt):
277262
ifself._name:
278263
returnself._name
279-
returnself._offset._format(0x22)
264+
returnself._offset._fmt(0x22)
280265

281266
deffromutc(self,dt):
282267
returndt+self._offset
@@ -287,7 +272,11 @@ def fromutc(self, dt):
287272

288273
def_date(y,m,d):
289274
ifMINYEAR<=y<=MAXYEARand1<=m<=12and1<=d<=_dim(y,m):
290-
return_ymd2o(y,m,d)
275+
# year -> number of days before January 1st of year.
276+
Y=y-1
277+
_dby=Y*365+Y//4-Y//100+Y//400
278+
# y, month, day -> ordinal, considering 01-Jan-0001 as day 1.
279+
return_dby+_dbm(y,m)+d
291280
elify==0andm==0and1<=d<=3_652_059:
292281
returnd
293282
else:
@@ -310,11 +299,11 @@ def __init__(self, year, month, day):
310299

311300
@classmethod
312301
deffromtimestamp(cls,ts):
313-
returncls(*_tmod.localtime(ts)[:3])
302+
returncls(*_t.localtime(ts)[:3])
314303

315304
@classmethod
316305
deftoday(cls):
317-
returncls(*_tmod.localtime()[:3])
306+
returncls(*_t.localtime()[:3])
318307

319308
@classmethod
320309
deffromordinal(cls,n):
@@ -490,7 +479,9 @@ def _iso2t(s):
490479

491480

492481
def_t2iso(td,timespec,dt,tz):
493-
s=td._format(_TIME_SPEC.index(timespec))
482+
s=td._fmt(
483+
("auto","hours","minutes","seconds","milliseconds","microseconds").index(timespec)
484+
)
494485
iftzisnotNone:
495486
s+=tz.isoformat(dt)
496487
returns
@@ -633,18 +624,18 @@ def fromtimestamp(cls, ts, tz=None):
633624
else:
634625
us=0
635626
iftzisNone:
636-
dt=cls(*_tmod.localtime(ts)[:6],microsecond=us,tzinfo=tz)
637-
s= (dt-datetime(*_tmod.localtime(ts-86400)[:6]))._us//1_000_000-86400
638-
ifs<0anddt==datetime(*_tmod.localtime(ts+s)[:6]):
627+
dt=cls(*_t.localtime(ts)[:6],microsecond=us,tzinfo=tz)
628+
s= (dt-datetime(*_t.localtime(ts-86400)[:6]))._us//1_000_000-86400
629+
ifs<0anddt==datetime(*_t.localtime(ts+s)[:6]):
639630
dt._fd=1
640631
else:
641-
dt=cls(*_tmod.gmtime(ts)[:6],microsecond=us,tzinfo=tz)
632+
dt=cls(*_t.gmtime(ts)[:6],microsecond=us,tzinfo=tz)
642633
dt=tz.fromutc(dt)
643634
returndt
644635

645636
@classmethod
646637
defnow(cls,tz=None):
647-
returncls.fromtimestamp(_tmod.time(),tz)
638+
returncls.fromtimestamp(_t.time(),tz)
648639

649640
@classmethod
650641
deffromordinal(cls,n):
@@ -814,7 +805,7 @@ def astimezone(self, tz=None):
814805
_tz=self._tz
815806
if_tzisNone:
816807
ts=int(self._mktime())
817-
os=datetime(*_tmod.localtime(ts)[:6])-datetime(*_tmod.gmtime(ts)[:6])
808+
os=datetime(*_t.localtime(ts)[:6])-datetime(*_t.gmtime(ts)[:6])
818809
else:
819810
os=_tz.utcoffset(self)
820811
utc=self-os
@@ -823,7 +814,7 @@ def astimezone(self, tz=None):
823814

824815
def_mktime(self):
825816
deflocal(u):
826-
return (datetime(*_tmod.localtime(u)[:6])-epoch)._us//1_000_000
817+
return (datetime(*_t.localtime(u)[:6])-epoch)._us//1_000_000
827818

828819
epoch=datetime.EPOCH.replace(tzinfo=None)
829820
t,us=divmod((self-epoch)._us,1_000_000)
@@ -863,10 +854,10 @@ def tzname(self):
863854

864855
deftimetuple(self):
865856
ifself._tzisNone:
866-
conv=_tmod.gmtime
857+
conv=_t.gmtime
867858
epoch=datetime.EPOCH.replace(tzinfo=None)
868859
else:
869-
conv=_tmod.localtime
860+
conv=_t.localtime
870861
epoch=datetime.EPOCH
871862
returnconv(round((self-epoch).total_seconds()))
872863

@@ -909,4 +900,4 @@ def tuple(self):
909900
returnd+t+ (self._tz,self._fd)
910901

911902

912-
datetime.EPOCH=datetime(*_tmod.gmtime(0)[:6],tzinfo=timezone.utc)
903+
datetime.EPOCH=datetime(*_t.gmtime(0)[:6],tzinfo=timezone.utc)

0 commit comments

Comments
 (0)
[8]ページ先頭
©2009-2025 Movatter.jp