Seaborn multiple barplots

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Yes you need to reshape the DataFrame:

df = pd.melt(df, id_vars="class", var_name="sex", value_name="survival rate")
df
Out: 
    class       sex  survival rate
0   first       men       0.914680
1  second       men       0.300120
2   third       men       0.118990
3   first     woman       0.667971
4  second     woman       0.329380
5   third     woman       0.189747
6   first  children       0.660562
7  second  children       0.882608
8   third  children       0.121259

Now, you can use factorplot (v0.8.1 or earlier):

sns.factorplot(x='class', y='survival rate', hue="sex", data=df, kind='bar')

enter image description here

For versions 0.9.0 or later, as Matthew noted in the comments, you need to use the renamed version, catplot. 

sns.catplot(x='class', y='survival rate', hue="sex", data=df, kind='bar')

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