/usr/lib/python3/dist-packages/cypari2/closure.pxd is in python3-cypari2 1.1.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | from .gen cimport Gen
cpdef Gen objtoclosure(f)
cdef void _pari_init_closure()
|