In [2]: pd.Series([0,0,0], dtype="category")
Out[2]:
0 0
1 0
2 0
dtype: category
Categories (1, int64): [0]
In [3]: pd.Series(0, index=range(3), dtype="category")
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-3-2c1d7a241071> in <module>()
----> 1 pd.Series(0, index=range(3), dtype="category")
/home/nobackup/repo/pandas/pandas/core/series.pyc in __init__(self, data, index, dtype, name, copy, fastpath)
224 else:
225 data = _sanitize_array(data, index, dtype, copy,
--> 226 raise_cast_failure=True)
227
228 data = SingleBlockManager(data, index, fastpath=True)
/home/nobackup/repo/pandas/pandas/core/series.pyc in _sanitize_array(data, index, dtype, copy, raise_cast_failure)
2961 if len(subarr) != len(index) and len(subarr) == 1:
2962 subarr = create_from_value(subarr[0], index,
-> 2963 subarr.dtype)
2964
2965 elif subarr.ndim > 1:
/home/nobackup/repo/pandas/pandas/core/series.pyc in create_from_value(value, index, dtype)
2929 else:
2930 if not isinstance(dtype, (np.dtype, type(np.dtype))):
-> 2931 dtype = dtype.dtype
2932 subarr = np.empty(len(index), dtype=dtype)
2933 subarr.fill(value)
AttributeError: 'CategoricalDtype' object has no attribute 'dtype'
(Not a particularly brilliant use of categories, but they can then be concatenated with others.)
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