感谢万能的google！

一开始google搜索“pycharm2022 invalid python sdk cannot set up a python sdk at python 3.11”，进入链接：'Cannot setup a Python SDK' in PyCharm project using virtualenv after OS reinstallation - Stack Overflow

 问题和我的类似，但是帖子提到了一个日志文件：idea.log，找出来。果然我的日志，大量报错：

2023-06-19 15:04:23,253 [7654476]   WARN - #c.j.p.s.f.PythonSdkFlavor - Couldn't get interpreter version: process exited with code 101
Unable to create process using 'D:\Program Files\python39\python39\python.exe -V'

2023-06-19 15:04:23,291 [7654514]   WARN - #c.j.p.s.f.PythonSdkFlavor - Couldn't get interpreter version: process exited with code 101
Unable to create process using 'D:\Program Files\python39\python39\python.exe -V'

2023-06-19 15:04:23,324 [7654547]   WARN - #c.j.p.s.f.PythonSdkFlavor - Couldn't get interpreter version: process exited with code 101
Unable to create process using 'D:\Program Files\python39\python39\python.exe -V'

再google“c.j.p.s.f.PythonSdkFlavor - Couldn't get interpreter version: process exited with code 101
Unable to create process using”

找到链接：https://youtrack.jetbrains.com/issue/PY-39571/Failed-to-Create-Interpreter-error-on-Windows-10-when-python-path-contains-space

 官网的，说是路径多了个空格的原因。把空格去掉，果然跑通了。

感谢万能的google