rebuilt fast path: True in 0.17s
so exists: True
total 52
drwxr-xr-x 1 root root  4096 Sep  7 19:00 .
drwxr-xr-x 1 root root  4096 Sep  7 18:48 ..
drwxr-xr-x 2 root root  4096 Sep  7 18:59 __pycache__
-rw-r--r-- 1 root root  6133 Sep  7 18:58 _fasteig.c
-rwxr-xr-x 1 root root 16816 Sep  7 19:00 _fasteig.so
-rw-r--r-- 1 root root  2302 Sep  7 18:59 eigen.py
-rw-r--r-- 1 root root  2246 Sep 13  2025 eval.py
