python 为什么“lala”+ int需要转换为str，而“lala”* 2不需要？

xvw2m8pv 于 2023-04-04 发布在 Python

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此问题在此处已有答案：

How can I concatenate str and int objects?（1个答案）
两年前关闭了。
这是可行的

In [2]:
"I said " + ("Hey " * 2) + "Hey!"
Out[2]:
'I said Hey Hey Hey!'

但这个不一样为什么

In [3]:
"The correct answer to this multiple choice exercise is answer number " + 2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    "The correct answer to this multiple choice exercise is answer number " + 2
TypeError: must be str, not int

python

来源：https://stackoverflow.com/questions/65238130/why-does-the-lala-int-need-a-conversion-to-str-but-the-lala-2-doesnt