25519 | Key agreement and signing , X25519 keys | Cryptography library

I want to do the following :

1. flag anomalies in 10 .csv files in a folder (all 10 files have the same column names A-J).

2. export the flagged data frames to 1 .xlsx with 10 sheets (append the 10 flagged df to 1 xlsx file)

NOTE: The anomaly here is defined as any value lower than 1500 and higher than 100000 in each row.

To flag one file at a time, the code looks something like this :

Python newbie here, I will like to flag sporadic numbers that are obviously off from the rest of the row. In simple terms, flag numbers that seem not to belong to each row. Numbers in 100s and 100000s are considered 'off the rest'

Here is the command I used on ubuntu 20.x to generate key pair of EdDSA 25519 for JOSE/NODEJS (14.16) app:

I have a C library I need to use in my Swift code and a function thet expects an UnsafeMutablePointer that is 32 bytes long to generate a public key from an existing private key (crypto_sign_public_key). Here is a link to the docs of the C function I am calling: https://monocypher.org/manual/sign. I don't have much experience with C and pointers but I've read a few tutorials and have something that seems to be working perfectly.

Aside from that though, I wanted to see if anyone with more experience than me might be able to say if this code is "safe" and/or will potentially produce undefined behaviour?

I am trying to implement the X3DH algorithm from Signal in Go. However, I got stuck on how to sign the Public Signed PreKey.

Per the specifications it is supposed to be an X25519 key. In looking at previous implementations on Github they generated a [32]byte key from the curve25519 package and then converted it to an ed25519 key and then signed it.

However, the packages they used for the conversion are deprecated (github.com/agl/ed25519). Therefore, I either need to be able to convert the keys to ed25519 so I can sign them with the current ed25519 package (golang.org/x/crypto/25519) or implement a sign and verify function for curve25519 keys.