pydata/pandas — pull request #6132 by hayd (2014-01-27 21:04:44+00:00)
Title: ENH get_dummies str method

fixes #3695.

```
In [8]: s = pd.Series(['a|b', 'a|c', np.nan], list('ABC'))

In [9]: s.str.get_dummies('|')
Out[9]:
a b c
A 1 1 0
B 1 0 1
C NaN NaN NaN

[3 rows x 3 columns]
```

*iterates over each tag filling in with str.contains.*