Python design pattern-body mode

Demand, return to work status based on current time

#Encoding=utf-8__author__='[email protected]'defget_state (hour):ifHour>=8 andHour<=12:        return 'morning work, Spirit hundredfold'    elifHour>12 andHour<=14:        return 'work at noon, sleepy, want to have lunch break'    elifHour>14 andHour<=18:        return 'afternoon work, good condition'    elifHour>18 andHour<=20:        return 'working overtime, not very good condition.'    Else:        return 'No , I'm going to bed.'if __name__=='__main__':     forHourinch(9,11,12,13,14,17,19,22,23):        Print '%d points,'%hour,get_state (Hour)

The disadvantage is that if the state is very long, (now 5 kinds), this code will be very lengthy, so later maintenance is more difficult

State mode

#Encoding=utf-8__author__='[email protected]' fromAbcImportAbcmeta, AbstractmethodclassState ():__metaclass__=Abcmeta @abstractmethoddefWrite_code (self):PassclassMorning (state):defWrite_code (self, work):ifWork.hour <= 12 andWork.hour > 8:            Print 'morning work, Spirit hundredfold'        Else: Work.set_status (Noon ()) Work.write_code (work)classNoon (state):defWrite_code (self, work):ifWork.hour <= 14 andWork.hour>12 :            Print 'work at noon, sleepy, want to have lunch break'        Else: Work.set_status (Afternoon ()) Work.write_code (work)classafternoon (State):defWrite_code (self, work):ifWork.hour <= 18 andWork.hour>14:            Print 'afternoon work, good condition'        Else: Work.set_status (Eve ()) Work.write_code (work)classEve (state):defWrite_code (self, work):ifWork.hour <= 22 andWork.hour>18:            Print 'working overtime, not very good condition.'        Else: Work.set_status (Night ()) Work.write_code (work)classNight (state):defWrite_code (self, work):ifWork.hour <= 8orWork.hour > 22:            Print 'No , I'm going to bed.'        Else: Work.set_status (Morning ()) Work.write_code (work)classWork ():def __init__(self, Hour): Self.hour=hour self.state=morning ()defSet_status (Self, State): Self.state= StatedefWrite_code (self, Work): Self.state.write_code (work)if __name__=='__main__': Work= Work (10)     forHourinch(9, 11, 12, 13, 14, 17, 19, 22, 23,12): Work.hour=HourPrint '%d points,'%hour Work.write_code (work)

State mode, define a state of the abstract class, for each state to build a class, the class has a handle function (here is Write_code), in accordance with the work of the time to do the corresponding processing, the benefits of this is very flexible, each state has its own judgment logic. It is more convenient to expand and maintain.

Python design pattern-body mode