Closed
Description
Code Sample, a copy-pastable example if possible
# Your code here
pop = {'Nevada': {2001: 2.4, 2002: 2.9},
'Ohio': {2000: 1.5, 2001: 1.7, 2002: 3.6}}
pd.DataFrame(pop, index=[2001, 2002, 2003])Problem description
Raises exception:
In [6]: pd.DataFrame(pop, index=[2001, 2002, 2003])
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-6-84df27ae30f4> in <module>()
----> 1 pd.DataFrame(pop, index=[2001, 2002, 2003])
~/miniconda/envs/arrow-dev/lib/python3.6/site-packages/pandas/core/frame.py in __init__(self, data, index, columns, dtype, copy)
346 dtype=dtype, copy=copy)
347 elif isinstance(data, dict):
--> 348 mgr = self._init_dict(data, index, columns, dtype=dtype)
349 elif isinstance(data, ma.MaskedArray):
350 import numpy.ma.mrecords as mrecords
~/miniconda/envs/arrow-dev/lib/python3.6/site-packages/pandas/core/frame.py in _init_dict(self, data, index, columns, dtype)
457 arrays = [data[k] for k in keys]
458
--> 459 return _arrays_to_mgr(arrays, data_names, index, columns, dtype=dtype)
460
461 def _init_ndarray(self, values, index, columns, dtype=None, copy=False):
~/miniconda/envs/arrow-dev/lib/python3.6/site-packages/pandas/core/frame.py in _arrays_to_mgr(arrays, arr_names, index, columns, dtype)
7357
7358 # don't force copy because getting jammed in an ndarray anyway
-> 7359 arrays = _homogenize(arrays, index, dtype)
7360
7361 # from BlockManager perspective
~/miniconda/envs/arrow-dev/lib/python3.6/site-packages/pandas/core/frame.py in _homogenize(data, index, dtype)
7659 if isinstance(v, dict):
7660 if oindex is None:
-> 7661 oindex = index.astype('O')
7662
7663 if isinstance(index, (DatetimeIndex, TimedeltaIndex)):
AttributeError: 'list' object has no attribute 'astype'
This code has worked for about 10 years; is this a deliberate change?