Python Builder's classic program

ImportRandomdefget_data ():"""returns 3 random numbers from 0 to 9"""    returnRandom.sample (Range (10), 3) defconsume ():"""displays the dynamic average of each incoming integer list"""Running_sum=0 Data_items_seen=0 whileTrue:data=yieldData_items_seen+=len (data) Running_sum+=sum (data)Print('The running average is {}'. Format (Running_sum/float (data_items_seen))) defProduce (consumer):"""generate sequence set, passed to consumption function (consumer)"""     whileTrue:data=Get_data ()Print('produced {}'. Format (data) consumer.send (data)yield if __name__=='__main__': Consumer=consume () #启动生成器 Consumer.send (None) producer=Produce (consumer) for_inchRange (10):        Print('Producing ...') Next (producer)

Contrast:yield as a statement or an expression.

ImportRandomdefget_data ():"""returns 3 random numbers from 0 to 9"""    returnRandom.sample (Range (10), 3) defconsume (data):"""displays the dynamic average of each incoming integer list"""Running_sum=0 Data_items_seen=0 whileTrue:data=yieldData"""internal suspend generator, yield as expression instead of statement"""        """when the generator runs, yield returns a value that is the value sent externally by the Send method"""Data_items_seen+=len (data) Running_sum+=sum (data)Print('The running average is {}'. Format (Running_sum/float (data_items_seen))) defProduce (consumer):"""generate sequence set, passed to consumption function (consumer)"""     whileTrue:data=Get_data ()Print('produced {}'. Format (data) consumer.send (data)yield if __name__=='__main__': Consumer=consume (0) consumer.send (None) producer=Produce (consumer) for_inchRange (10):        Print('Producing ...') Next (producer)

View Code

Python Builder's classic program