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What Does The Yield Keyword Do In Python?

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The yield keyword can turn any function into a generator. It works like a standard return keyword. But it’ll always return a generator object. Also, a method can have multiple calls to the yield keyword.

See the example below.

def testgen(index):

  weekdays = ['sun','mon','tue','wed','thu','fri','sat']

  yield weekdays[index]

  yield weekdays[index+1]

day = testgen(0)

print next(day), next(day)

#output: sun mon

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