BUG: DataFrame quantile with only datetime dtypes should provide better error message (original) (raw)

In [41]: df = DataFrame({"A": [1, 2, 3], "B": [2, 3, 4]})

In [42]: df['C'] = pd.date_range('2014-01-01', periods=3, freq='m')

In [43]: df Out[43]: A B C 0 1 2 2014-01-31 1 2 3 2014-02-28 2 3 4 2014-03-31

In [44]: df[['C']].quantile(.5)

ValueError Traceback (most recent call last) in () ----> 1 df[['C']].quantile(.5)

/Users/tom/Envs/pandas-dev/lib/python2.7/site-packages/pandas/pandas/core/frame.pyc in quantile(self, q, axis, numeric_only) 4192 quantiles = [[f(vals, x) for x in per] 4193 for (_, vals) in data.iteritems()] -> 4194 result = DataFrame(quantiles, index=data._info_axis, columns=q).T 4195 if len(is_dt_col) > 0: 4196 result[is_dt_col] = result[is_dt_col].applymap(lib.Timestamp)

/Users/tom/Envs/pandas-dev/lib/python2.7/site-packages/pandas/pandas/core/frame.pyc in init(self, data, index, columns, dtype, copy) 253 else: 254 mgr = self._init_ndarray(data, index, columns, dtype=dtype, --> 255 copy=copy) 256 elif isinstance(data, collections.Iterator): 257 raise TypeError("data argument can't be an iterator")

/Users/tom/Envs/pandas-dev/lib/python2.7/site-packages/pandas/pandas/core/frame.pyc in _init_ndarray(self, values, index, columns, dtype, copy) 365 columns = _ensure_index(columns) 366 --> 367 return create_block_manager_from_blocks([values.T], [columns, index]) 368 369 @property

/Users/tom/Envs/pandas-dev/lib/python2.7/site-packages/pandas/pandas/core/internals.pyc in create_block_manager_from_blocks(blocks, axes) 3183 blocks = [getattr(b, 'values', b) for b in blocks] 3184 tot_items = sum(b.shape[0] for b in blocks) -> 3185 construction_error(tot_items, blocks[0].shape[1:], axes, e) 3186 3187

/Users/tom/Envs/pandas-dev/lib/python2.7/site-packages/pandas/pandas/core/internals.pyc in construction_error(tot_items, block_shape, axes, e) 3164 raise e 3165 raise ValueError("Shape of passed values is {0}, indices imply {1}".format( -> 3166 passed,implied)) 3167 3168

ValueError: Shape of passed values is (0, 0), indices imply (1, 0)