pd.DataFrame(np.arange(12).reshape((4, 3)), columns=['foo', 'bar', 'baz'], index=pd.date_range('2000-01-01', periods=3)) --------------------------------------------------------------------------- AssertionError Traceback (most recent call last) <ipython-input-80-77df75afb13d> in <module>() 1 pd.DataFrame(np.arange(12).reshape((4, 3)), columns=['foo', 'bar', 'baz'], ----> 2 index=pd.date_range('2000-01-01', periods=3)) /Users/wesm/code/pandas/pandas/core/frame.pyc in __init__(self, data, index, columns, dtype, copy) 408 else: 409 mgr = self._init_ndarray(data, index, columns, dtype=dtype, --> 410 copy=copy) 411 elif isinstance(data, list): 412 if len(data) > 0: /Users/wesm/code/pandas/pandas/core/frame.pyc in _init_ndarray(self, values, index, columns, dtype, copy) 555 556 block = make_block(values.T, columns, columns) --> 557 return BlockManager([block], [columns, index]) 558 559 def _wrap_array(self, arr, axes, copy=False): /Users/wesm/code/pandas/pandas/core/internals.pyc in __init__(self, blocks, axes, do_integrity_check) 826 827 if do_integrity_check: --> 828 self._verify_integrity() 829 830 self._consolidate_check() /Users/wesm/code/pandas/pandas/core/internals.pyc in _verify_integrity(self) 916 "items") 917 if block.values.shape[1:] != mgr_shape[1:]: --> 918 raise AssertionError('Block shape incompatible with manager') 919 tot_items = sum(len(x.items) for x in self.blocks) 920 if len(self.items) != tot_items: AssertionError: Block shape incompatible with manager