Simple understanding of the generator

Formula list # 

# DEF f (n-): 
# n-return **. 3 
# 
# X = [f (A) for A in Range (10)] f function first calls #, 
# Print (X) 


DEF bar (): 

    Print ( "OK1") 
    yield 1 

    Print ( "OK2") 
    yield 2 


S = bar () # Builder is a state of the object can be recorded when performing where he will remember the current execution state, then the next execution time , from where the end of the last started 
Print (S) 
Print (Next (S)) 
Print (Next (S)) 


S = (X **. 3 for X in Range (100000000)) # generated at this time is defined a is 
Print (S) # <generator Object <genexpr> AT 0x000000000BAF43B8> 

Print (Next (S)) # 0 
Print (Next (S)) #. 1 


for X in S: # generator itself is an iterator object generator Why provincial memory python itself because there is a garbage collection mechanism, when a variable is not referenced, the variable will be cleared python 
    Print (the X-) 
    
    
# 0 0 1 1 2 3 5 8 
DEF fib (max):

    n , before,after = 0, 0, 1,

    while n < max:
        yield before

        before, after = after, before+after


        n = n+1

g=fib(3)
print(g)
print(next(g))

#send method 
DEF Loger (): 
    COUNT = the yield "qwer" 
    Print (COUNT) 

    COUNT = the yield "qwer" 

    Print (COUNT) 


G = Loger () # generated ah is assigned to a variable 
a = next (g) # call this generator, and then allowed to return to a variable to receive a variable 
Print (a) 
# g.send (None) Next # = (G) 
B = g.send ( "ABC") # send to use this method, firstly to pass parameters (None) a blank for the generator, because they do not pass parameters, then, send do not know to whom to pass parameters to accept not send can be passed as a parameter generator loger, but first of all we have about the implementation of this generator 
print (B) 
g.send ( "EFG") 


#yield pseudo concurrency

Time Import 
DEF Consumer (name): 
    Print ( "% S ready bun it!"% name) 
    the while True: 
       Baozi = yield 

       Print ( "bun [% s] came, the [% s] to eat!"% ( Baozi, name)) 


DEF Producer (name): 
    C = Consumer ( 'A') 
    C2 = Consumer ( 'B') 
    C .__ Next __ () 
    C2 .__ Next __ () 
    Print ( "! began to prepare baking it") 
    for in the Range i (10): 
        the time.sleep (1) 
        Print ( "! do two buns") 
        c.send (i) 
        c2.send (i) 

Producer ( "alex")

Simple understanding of the generator

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