Python 日期和时间用法超强总结

import time
#time
a=time.time() #total seconds since epoch
print("Seconds since epoch :",a,end='n----------n')
#ctime
print("Current date and time:")
print(time.ctime(a),end='n----------n') 
#sleep
time.sleep(1) #execution will be delayed by one second
#localtime
print("Local time :")
print(time.localtime(a),end='n----------n')
#gmtime
print("Local time in UTC fORMat :")
print(time.gmtime(a),end='n-----------n')
#mktime
b=(2019,8,6,10,40,34,1,218,0)
print("Current Time in seconds :")
print( time.mktime(b),end='n----------n')
#asctime
print("Current Time in local format :")
print( time.asctime(b),end='n----------n')
#strftime
c = time.localtime() # get struct_time
d = time.strftime("%m/%d/%Y, %H:%M:%S", c)
print("String representing date and time:")
print(d,end='n----------n')
#strptime
print("time.strptime parses string and returns it in struct_time format :n")
e = "06 AUGUST, 2019"
f = time.strptime(e, "%d %B, %Y")
print(f)

Seconds since epoch : 1565070251.7134922
———-
Current date and time:
Tue Aug 6 11:14:11 2019
———-
Local time :
time.struct_time(tm_year=2019, tm_mon=8, tm_mday=6, tm_hour=11, tm_min=14, tm_sec=11, tm_wday=1, tm_yday=218, tm_isdst=0)
———-
Local time in UTC format :
time.struct_time(tm_year=2019, tm_mon=8, tm_mday=6, tm_hour=5, tm_min=44, tm_sec=11, tm_wday=1, tm_yday=218, tm_isdst=0)
———–
Current Time in seconds :
1565068234.0
———-
Current Time in local format :
Tue Aug 6 10:40:34 2019
———-
String representing date and time:
08/06/2019, 11:14:12
———-
time.strptime parses string and returns it in struct_time format :

time.struct_time(tm_year=2019, tm_mon=8, tm_mday=6, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=1, tm_yday=218, tm_isdst=-1)

import datetime
#datetime constructor
print("Datetime constructor:n")
print(datetime.datetime(2019,5,3,8,45,30,234),end='n----------n')
 
#today
print("The current date and time using today :n")
print(datetime.datetime.today(),end='n----------n')
 
#now
print("The current date and time using today :n")
print(datetime.datetime.now(),end='n----------n')
 
#date
print("Setting date :n")
print(datetime.date(2019,11,7),end='n----------n')

#time
print("Setting time :n")
print(datetime.time(6,30,23),end='n----------n')
 
#date.fromtimestamp
print("Converting seconds to date and time:n")
print(datetime.date.fromtimestamp(23456789),end='n----------n')
 
#timedelta
b1=datetime.timedelta(days=30, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=4, weeks=8)
b2=datetime.timedelta(days=3, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=4, weeks=8)
b3=b2-b1
print(type(b3))
print("The resultant duration = ",b3,end='n----------n')
 
#attributes
a=datetime.datetime.now() #1
print(a)
print("The year is :",a.year)
 
print("Hours :",a.hour)

Datetime constructor:

2019-05-03 08:45:30.000234
———-
The current date and time using today :

2019-08-06 13:09:56.651691
———-
The current date and time using today :

2019-08-06 13:09:56.651691
———-
Setting date :

2019-11-07
———-
Setting time :

06:30:23
———-
Converting seconds to date and time:
1970-09-29
———-

The resultant duration = -27 days, 0:00:00
———-
2019-08-06 13:09:56.653694
The year is : 2019
Hours : 13