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BUG: non-numeric asignment to numeric column not upcasting #3216

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jreback opened this issue Mar 29, 2013 · 0 comments · Fixed by #3219
Closed

BUG: non-numeric asignment to numeric column not upcasting #3216

jreback opened this issue Mar 29, 2013 · 0 comments · Fixed by #3219
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Bug Dtype Conversions Unexpected or buggy dtype conversions
Milestone
0.11

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@jreback
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jreback commented Mar 29, 2013

http://stackoverflow.com/questions/15704274/adding-new-column-to-pandas-dataframe-with-values-for-particular-items

In [18]: df = pd.DataFrame([{"a": 1}, {"a": 3, "b": 2}])

In [19]: df['c'] = np.nan
In [21]: df.ix[0,'c'] = 'foo'
---------------------------------------------------------------------------
ValueError: could not convert string to float: f
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Bug Dtype Conversions Unexpected or buggy dtype conversions
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0.11
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BUG: GH3216 Upcast when needed to DataFrame when setitem with indexer jreback/pandas
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