Question

Você pode dar um exemplo do uso de geradores em Python?

Answer 1

Veja o exemplo abaixo para definir uma sequência infinita:

Python 2

def fibonacci_generator():
    f1=0
    f2=1
    while True:
        yield f1
        f1, f2 = f2, f1 + f2
        #yield does not stopIteration like return
        #it passes a value to whoever called next(), 
        #and saves the "state" of the generator function



if __name__ == '__main__':

    f=fibonacci_generator()

    for i in range(10):
        print f.next()

Python 3:

def fibonacci_generator():
    f1=0
    f2=1
    while True:
        yield f1
        f1, f2 = f2, f1 + f2
        #yield does not stopIteration like return (it creates a generator)
        #it passes a value to whoever called next(), 
        #and saves the "state" of the generator function


if __name__ == '__main__':

    f=fibonacci_generator()

    for i in range(10):
        print (f.__next__())

# Ou
#    for i in range(10):
#        print (next(f))