plotting._stringify not unicode safe

[JoeGermuska]

/Users/germuska/.virtualenvs/data/lib/python2.6/site-packages/pandas/tools/plotting.pyc in _stringify(x)
1073 return '|'.join(str(y) for y in x)
1074 else:
-> 1075 return str(x)
1076
1077

UnicodeEncodeError: 'ascii' codec can't encode character u'\u2019' in position 1: ordinal not in range(128)

If labels can't be unicode, perhaps can a clearer error be thrown?

[changhiskhan]

Matplotlib supports unicode so we don't have to limit pandas plotting functions either I think.
Would you be interested in making a pull request on this? You can use the stringify functionality in pandas.core.common as a reference

[lodagro]

fixed

In [13]: df
Out[13]: 
c0     bar   
c1       Δ  Ε
i0 i1        
α  0     8  5
   1     6  5
β  2     2  4
   3     8  7
γ  4     1  8
   5     7  7
δ  6     9  3
   7     5  7

In [14]: df.plot(title=u'\u03A3')
Out[14]: <matplotlib.axes.AxesSubplot at 0xa01cbac>