Python中的时间函数 | Set-2(日期操作)
第 1 组中讨论了一些时间函数
日期操作也可以使用Python使用“datetime”模块并在其中使用“date”类来执行。
日期操作:
1. MINYEAR :- 它显示可以使用日期类表示的最小年份。
2. MAXYEAR :- 它显示可以使用日期类表示的最大年份。
# Python code to demonstrate the working of
# MINYEAR and MAXYEAR
# importing built in module datetime
import datetime
from datetime import date
# using MINYEAR to print minimum representable year
print ("Minimum representable year is : ",end="")
print (datetime.MINYEAR)
# using MAXYEAR to print maximum representable year
print ("Maximum representable year is : ",end="")
print (datetime.MAXYEAR)
输出:
Minimum representable year is : 1
Maximum representable year is : 9999
3. date(yyyy-mm-dd) :- 该函数返回一个字符串,其中传入的参数按年、月和日期的顺序排列。
4. today() :- 以 yyyy-mm-dd 格式返回当前日期。
# Python code to demonstrate the working of
# date() and today()
# importing built in module datetime
import datetime
from datetime import date
# using date() to represent date
print ("The represented date is : ",end="")
print (datetime.date(1997,4,1))
# using today() to print present date
print ("Present date is : ",end="")
print (date.today())
输出:
The represented date is : 1997-04-01
Present date is : 2016-08-02
5. fromtimestamp(sec) :- 它返回从参数中提到的纪元以来经过的秒数计算的日期。
6. min() :- 返回可以由日期类表示的最小日期。
7. max() :- 返回日期类可以表示的最大日期。
# Python code to demonstrate the working of
# fromtimestamp(), min() and max()
# importing built in module datetime
import datetime
from datetime import date
# using fromtimestamp() to calculate date
print ("The calculated date from seconds is : ",end="")
print (date.fromtimestamp(3452435))
# using min() to print minimum representable date
print ("Minimum representable date is : ",end="")
print (date.min)
# using max() to print minimum representable date
print ("Maximum representable date is : ",end="")
print (date.max)
输出:
The calculated date from seconds is : 1970-02-09
Minimum representable date is : 0001-01-01
Maximum representable date is : 9999-12-31