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DataFrame.from_records doesn't get dtype from empty ndarray #3682

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burdanov opened this issue May 22, 2013 · 0 comments · Fixed by #3708

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Bug Dtype Conversions

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burdanov commented May 22, 2013

a = np.array([(1, 2)], dtype=[('id', np.int64), ('value', np.int64)])
df = pd.DataFrame.from_records(a, index='id') # ok

b = np.array([], dtype=[('id', np.int64), ('value', np.int64)])
df = pd.DataFrame.from_records(b, index='id') # KeyError: 'id'

The cause is _to_arrays checks for empty data before understanding that ndarray was passed.

cpcloud mentioned this issue

BUG: allow DataFrame.from_records to accept empty recarrays #3708

Merged

jreback closed this as completed in #3708

jreback mentioned this issue

CLN: series to now inherit from NDFrame #3482

Merged

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