The datetime Library

1.import 日期时间库，打印当前日期和时间

from datetime import datetime
now = datetime.now()
print now

print now.year
print now.month
print now.day
print now.hour
print now.minute
print now.second

运行结果如下：

image.png

2.如何以 mm/dd/yyyy 的格式打印日期？以 hh:mm:ss 的格式打印时间？

from datetime import datetime
now = datetime.now()
print now

print "%02d-%02d-%04d" % (now.month, now.day, now.year)
print "%02d/%02d/%04d" % (now.month, now.day, now.year)

print "%02d:%02d:%02d" % (now.hour, now.minute, now.second)

运行结果如下：

image.png

3.打印格式化日期和时间

from datetime import datetime
now = datetime.now()

print '%02d/%02d/%04d %02d:%02d:%02d' % (now.month, now.day, now.year, now.hour, now.minute, now.second)

运行结果如下：

image.png