python_yield

def xranges():    print("111")    yield 1    print("222")    yield 2    print("333")    yield 3x = xranges()#打印输出r = x.__next__()#返回yield的返回值print(r)r = x.__next__()print(r)

仿写range

def xrangs(n):    i = 0    while True:        if i>n:            return        yield i        i +=1