TypeError: can only concatenate tuple (not "generator") to tuple

Question

def demo(*para):
    avg = sum(para) / len(para)
    g = (i for i in para if i > avg)
    return (avg,) + (g)
print(demo(1, 2, 3, 4))

家人们这个代码报错TypeError: can only concatenate tuple (not "generator") to tuple
是什么意思啊

Answer 1

g是生成器，不是元组，二者不能相加，要先把g转成元组