An ID map between Opta (code column in Master.csv), FPL, FBRef, Transfermarkt, Understat, and WhoScored. To load the latest CSV, you can do something like
import pandas as pd
url = "https://raw.githubusercontent.com/ChrisMusson/FPL-ID-Map/refs/heads/main/Master.csv"
df = pd.read_csv(url)