Python Learning day05

One, Time, datetime

1. 1 >>> time.localtime ()2 time.struct_time (tm_year=2016, tm_mon=8, tm_mday=26, tm_ Hour=16, tm_min=21, tm_sec=38, tm_wday=4, tm_yday=239, tm_isdst=0)3 >>> time.gmtime ()  4 time.struct_time (tm_year=2016, tm_mon=8, tm_mday=26, Tm_hour=8, tm_min=21, tm_sec=44, tm_wday=4, tm_ yday=239, tm_isdst=0)

   time stamp conversion to a tuple

   1 >>> a =time.localtime ()2 >>> a3 time.struct_time (tm _year=2016, Tm_mon=8, tm_mday=26, tm_hour=16, tm_min=23, tm_sec=31, tm_wday=4, tm_yday=239, tm_isdst=0)4< /c6> >>> Time.mktime (a)5 1472199811.0

   tuples converted to timestamps

   1>>a2Time.struct_time (tm_year=2016, tm_mon=8, tm_mday=26, tm_hour=16, tm_min=23, tm_sec=31, tm_wday=4, tm_yday=239, tm_ isdst=0)3>>> Time.strptime ('2016-12-12 12:12:12',"%y-%m-%d%h:%m:%s")4Time.struct_time (tm_year=2016, tm_mon=12, tm_mday=12, tm_hour=12, tm_min=12, tm_sec=12, tm_wday=0, tm_yday=347, tm_ Isdst=-1)5>>> Time.strftime ("%y-%m-%d%h:%m:%s", a)6 '2016-08-26 16:23:31'

   tuples and Formatting

   1 >>> a= time.localtime ()2 >>> a3 time.struct_time (tm _year=2016, Tm_mon=8, tm_mday=26, tm_hour=16, tm_min=26, tm_sec=42, tm_wday=4, tm_yday=239, tm_isdst=0)4< /c6> >>> Time.asctime (a)5'Fri-16:26:42'

   tuples converted to strings

   1 >>> a = time.mktime (time.localtime ())2 >>> a3 1472200092.04 >>> time.ctime (a)5'Fri 16:28:12  '

   Timestamp converted to string

   1 >>> datetime.datetime.now ()2 datetime.datetime (8, 6, 74390)  3 >>> datetime.datetime.now () + Datetime.timedelta ( -4)4 datetime.datetime ( 8, 625394,5 >>> datetime.datetime.now () + Datetime.timedelta (hours=9) )6 datetime.datetime (2016, 8, 27, 1, 29, 16, 201594)

   datetime

Second, random module

Random.randint (1,9) 1 and 9 are all in
Random.randrange (1,8) 8 not in

Random.random (0-1)
Random.uniform (1,10)

Random.randrange (1,8)

Random.choice (' HELLP ') randomly select a

Random.sample (' Hello ', 2)

>>> a=[1,2,3,4,5]
>>> Random.shuffle (a)
>>> A
[4, 1, 5, 3, 2]

Third, OS module
>>> OS.GETCWD ()
'/root/oldboy '
>>> os.chdir (' ... ')
>>> OS.GETCWD ()
'/root '

>>>os.chdir (R ')

>>> Os.curdir
‘.‘
>>> Os.pardir
‘..‘

Os.makedirs () Multilevel directory
Os.removedirs () Delete the multilevel directory, delete the previous level of the directory is empty, still delete
Os.mkdir () can only create single-level catalogs
Os.rmdir () Delete only single-stage

Os.listdir () lists the current directory
Os.rename (old,new)
Os.stat ()

Os.sep
Os.pathsep
Os.linesep

>>> Os.name
' POSIX '

Os.system ()
Os.environ
Os.path.abspath (PATH)

>>> Os.path.split (R '/root/1.c ')
('/root ', ' 1.c ')

>>> os.path.basename ('/root/1.c ')
' 1.c '

>>> os.path.dirname ('/root/1.c ')
'/root '

>>> os.path.exists ('/root ')
True

Os.path.isabs ('/root/1.c ')

Os.path.isfile () is a file
Os.path.isdir ()
Os.path.join ([', ']) multiple path combinations returned

Os.path.getatime ()
Os.path.getmtime ()

Four, Shutil module

Shutil.rmtree ()
Shutil.copytree (' Test ', ' newtest ')
Shutil.copystat ()
Shutil.copyfile ()
Shutil.move ()
Shutil.make_archive (N)

Five, shelve module

Import shelve

D = Shelve.open (' shelve_test ') #打开一个文件

Class Test (object):
def __init__ (self,n):
SELF.N = n


t = Test (123)
T2 = Test (123334)

name = ["Alex", "Rain", "Test"]
d["Test"] = name #持久化列表
d["T1"] = t #持久化类
d["t2"] = T2

D.close ()

Python Learning day05