时间的表示

time.time() 获得当前时刻，返回的是以秒为单位

时间原点是：1970.01.01 

>>> import time
>>> time.time()
1607166331.3027651
>>> b = int(time.time())
>>> b
1607166360
>>> totalMinutes = b//60
>>> totalMinutes
26786106
>>> totalHours = totalMinutes // 60
>>> totalHours
446435
>>> totalDays = totalHours // 24
>>> totalDays
18601
>>> totalYears = totalDays // 365
>>> totalYears
50