事实上，2to 3工具有一种模式，是可以不直接修改代码的，而默认情况下它是会的。你可以让它输出标准的diff来看看修改了什么。

Actually, the two-to-three tool has a mode where instead of modifying the code in place, what it normally does, you can also ask it to just print out unified diffs of what's going to change.

youdao

事实上，2to 3工具有一种模式，是可以不直接修改代码的，而默认情况下它是会的。你可以让它输出标准的diff来看看修改了什么。

Actually, the two-to-three tool has a mode where instead of modifying the code in place, what it normally does, you can also ask it to just print out unified diffs of what's going to change.

youdao