Print out a cheat sheet, falls back to tldr pages

cheat.py

#!/usr/bin/env python3

# depends on:
# https://github.com/sharkdp/bat
# https://github.com/tldr-pages/tldr

from glob import glob
from os import listdir, environ
import subprocess
from sys import argv

if len(argv) == 1:
    print(f" usage: {argv[0]} <term>")
    exit(1)

try:
    DIR = environ["CHEATDIR"]
except KeyError:
    print("[!] error: make sure to export CHEATDIR environment variable")

d = dict()
for item in listdir(DIR):
    d[item.split(".")[0]] = item

try:
    target = "%s/%s" % (DIR, d[argv[1]])
    subprocess.run(["bat", "-p", target])
except KeyError:
    subprocess.run(["tldr", argv[1]])