Snarfed by

import re
r = re.compile(r"#define XK_(\w*)\s*(\w*)(?:\s*\/\*\s*(.*)\s\*\/)*")

lines = open("keysymdef.h").read().rstrip().splitlines()
syms = []
for line in lines:
  if m := r.match(line):
    syms.append(list(m.groups()))

print("```csv sep=|")
print("csvhead: Keysym|Hex|Description")
for sym in syms:
  sym = [ x if x is not None else "" for x in sym ]
  print("|".join(sym))
print("```")

Keysyms