擅长:python、mysql、java
<pre><code>d = {'Jill': {'Avenger: Age of Ultron': 7.0,
'Django Unchained': 6.5,
'Gone Girl': 9.0,
'Kill the Messenger': 8.0},
'Toby': {'Avenger: Age of Ultron': 8.5,
'Django Unchained': 9.0,
'Zoolander': 2.0}}
df = pd.DataFrame.from_dict(d).reset_index()
df = pd.melt(df, id_vars=["index"],
var_name="By", value_name="Score").dropna()
</code></pre>