#!/usr/bin/env python


animals = ['OWL', 'Badger', 'bushbaby', 'Tiger', 'Wombat', 'GORILLA', 'AARDVARK']

# {KEY: VALUE for VAR ... in ITERABLE if CONDITION}
d = {a.lower(): len(a) for a in animals}  # <1>

print(d, '\n')

words = ['unicorn', 'stigmata', 'barley', 'bookkeeper']

d = {w:{c:w.count(c) for c in sorted(w)} for w in words} # <2>

for word, word_signature in d.items():
    print(word, word_signature)