Convert Solana CLI Keypair file to Base58 Encoded Private Key for use in Phantom Wallet

encode58.py

#!/usr/bin/python3
#I believe will only work on python3.  You need base58 (pip install base58)
#Please note: I'm not a programmer and there are probably more elegant ways to accomplish this, but this does work.
#Usage: Call the script with the keypair file as the first argument.
import base58
import sys
keyfile = sys.argv[1]
file = open(keyfile, 'r')
data = file.read().replace('\n', '').replace('[', '').replace(']', '')
file.close
key = b''
for x in data.split(','):
    w = int(x).to_bytes(1,'big')
    key = b"".join([key, w])
enc_key = base58.b58encode(key)
print(enc_key)