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TA貢獻(xiàn)1830條經(jīng)驗(yàn) 獲得超9個(gè)贊
您可以通過(隱式)使用datetime.timedelta來計(jì)算“格里高利”時(shí)間戳,該時(shí)間戳對(duì)從 1582 年 10 月 15 日至今(或您想使用的其他“紀(jì)元”)的日期有效。
作為函數(shù)的文檔字符串表示,日期字符串會(huì)在默認(rèn)情況下,可以用一個(gè)解析'%Y-%m-%d' strptime式的格式字符串參數(shù),但可以被覆蓋。
from datetime import datetime
GREGORIAN_EPOCH = datetime.strptime('1582-10-15', '%Y-%m-%d')
def gregorian_timestamp(date, format='%Y-%m-%d'):
""" Calculate timestamp using start of Gregorian calender as epoch.
The date parameter can be either a string or a datetime.datetime
object. Strings will be parsed using the '%Y-%m-%d' format by default
unless a different one is specfied via the optional format parameter.
"""
try:
date = datetime.strptime(date, format)
except TypeError:
pass
return (date - GREGORIAN_EPOCH).total_seconds() # The timedelta in seconds.
if __name__ == '__main__':
current_date = datetime.now()
timestamp = gregorian_timestamp(current_date)
print('gregorian timestamp:', timestamp) # -> gregorian timestamp: 13768250461.136208
timestamp = gregorian_timestamp('1970-01-01')
print('gregorian timestamp:', timestamp) # -> gregorian timestamp: 12219292800.0
timestamp = gregorian_timestamp('1955-02-28')
print('gregorian timestamp:', timestamp) # -> gregorian timestamp: 11750918400.0
timestamp = gregorian_timestamp('1582-10-15')
print('gregorian timestamp:', timestamp) # -> gregorian timestamp: 0.0
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