Between the "leap" determination date and string conversions occur

A time string format conversions:

1, switch time format string time

　　from time import strptime

　　>>> s_time = strptime("2020-01-10 09:29:15", "%Y-%m-%d %H:%M:%S")

　　>>> print(s_time)
　　time.struct_time(tm_year=2020, tm_mon=1, tm_mday=10, tm_hour=9, tm_min=29, tm_sec=15, tm_wday=4, tm_yday=10, tm_isdst=-1)

　　>>> print(s_time.tm_year)

　　2020

 

　　>>> s_time = strptime("2020-01", "%Y-%m")

　　>>> print(s_time)
　　time.struct_time(tm_year=2020, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=2, tm_yday=1, tm_isdst=-1)
　　>>> print(s_time.tm_year)
　　2020

2, time to String

　　>>> from time import strptime, strftime, localtime

　　>>> print(localtime())
　　time.struct_time(tm_year=2020, tm_mon=1, tm_mday=10, tm_hour=9, tm_min=35, tm_sec=42, tm_wday=4, tm_yday=10, tm_isdst=0)
　　>>> print(localtime().tm_year, localtime().tm_mday)
　　2020 10

　　>>> print(type(strftime("%Y-%m-%d %H:%M:%S", localtime())))
　　<class 'str'>

　　>>> print(strftime("%m-%d-%Y %H:%M:%S", localtime()))
　　01-10-2020 09:42:49
　　>>> print(type(strftime("%m-%d-%Y %H:%M:%S", localtime())))
　　<class 'str'>

Second, leap year judgment

　　import calendar

　　from datetime import date

　　from time import strptime, strftime, localtime

　　calendar of isleap can return True (leap year) and False (not a leap year)

　　>>> print(calendar.isleap(2012))

　　True

　　>>> print(calendar.isleap(date.today().year))
　　True

　　>>> print(calendar.isleap(localtime().tm_year))
　　True

　　ss = "2013"

　　>>> print(calendar.isleap(datetime.datetime.strptime(ss, "%Y").year))
　　False