擅长:python、mysql、java
<pre><code>movies = {"How to Be Single": ["Alison Brie", "Dakota Johnson",
"Rebel Wilson"],
"The Lego Movie": ["Will Arnett", "Elizabeth Banks",
"Alison Brie", "Will Ferrell"]}
stars = {}
for movie, v in movies.items():
for star in v:
if star in stars:
stars[star].append(movie)
else:
stars[star] = [movie]
print(stars)
</code></pre>
<p>印刷品:</p>
<pre><code>{'Alison Brie': ['How to Be Single', 'The Lego Movie'], 'Dakota Johnson': ['How to Be Single'], 'Rebel Wilson': ['How to Be Single'], 'Will Arnett': ['The Lego Movie'], 'Elizabeth Banks': ['The Lego Movie'], 'Will Ferrell': ['The Lego Movie']}
</code></pre>