2018-02-19

from datetime import datetime
now = datetime.now()

print '%s:%s:%s' % (now.hour, now.minute, now.second)

呃中间是要有冒号的注意啦

% 取模

复习一下且或非

and 一假则假
or 一真则真

'not' > 'and' > 'or'

not not True or False and not True
= not not True or (False and not True)

是true