python - 使用 print 和 for 循环函数打印 1 到 99

Question

我在 Python 3.6 的 IDLE 中尝试了以下内容

print(value for value in range(1,100))

在 IDLE 中产生一条消息，上面写着

<generator object <genexpr> at 0x101b73a40>

我不明白这是什么意思。我做错了什么吗？

Answer 1

(value for value in range(1,100)) 生成generator对象，如果要打印list，只需将其包裹在[]

print([value for value in range(1,100)])

或者你可以简单地

print(list(range(1,100)))

您可以阅读什么是生成器 HERE

A function which returns a generator iterator. It looks like a normal function except that it contains yield expressions for producing a series of values usable in a for-loop or that can be retrieved one at a time with the next() function.

Usually refers to a generator function, but may refer to a generator iterator in some contexts. In cases where the intended meaning isn’t clear, using the full terms avoids ambiguity.