/usr/lib/python3/dist-packages/Cryptodome/SelfTest/PublicKey/test_vectors/ECC/ecc_p256_private_p8_clear.pem is in python3-pycryptodome 3.4.7-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | -----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgXE5DIO8mD5Htn8WX
rumMgja2DgztaSzHoFfV5FeYoFKhRANCAASkCtWaIFDr6SR5vV+xa7LkW2Rl6zyy
se/+Qj+r5st0JNuCGe8Lq4Cs8m/XBZW2H+R2DTPu2A3QPS/Q37J7jOdc
-----END PRIVATE KEY-----
|