python from datetime import datetime as DT, timedelta as TD

initializingtimefornow = DT.now

print)

Newtime = initializingtimefornow + TD Newtime1 = initializingtimefornow + T_D

print) print)

PastDateBeforeTWOyrs = initializingtimefornow - TD PastDateBeforeTWOhours = initializingtimefornow - TD

FutureDateAfterTHREEyrs = initializingtimefornow + TD FutureDateAfterTHREEdays = initializingtimefornow + TD

运行这段代码将展示怎么用 datetime 和 timedelta 来计算当前时候的以后和过去日期，以及它们之间的差异呃。代码中Yi经填充了相应的天数、细小时数、毫秒数和秒数。