/usr/lib/python3/dist-packages/Cryptodome/SelfTest/PublicKey/test_vectors/ECC/ecc_p256_private_enc_des3.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 6 7 8 | -----BEGIN EC PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,7E383189A0521324
GT+hvDACAQAq8mD20yQFuQo5Gfg3gPJbZSErmgtdMa5xRLzPEWFnP1yOfZFIgVhn
HKLNhgrfbNRh3Ij/DcC6gQ+/35Ts9r+4KLMP6qXuEEfQGTCRu0JQbbMCheN7iNM1
8ji47sMaVPJPLrBbD6bPcUl8Tfv0+Xiikvxia5NjqAE=
-----END EC PRIVATE KEY-----
|