我在Windows 64 Bit上使用pandas 0.11.0。
我有一个数据存储区：
store = pandas.io.pytables.HDFStore( r"""C:\data.h5""" )
里面有一些数据：
print(store)
<class 'pandas.io.pytables.HDFStore'>
File path: C:\data.h5
/region frame (shape->[30,2])
/sector frame (shape->[116,2])
当我尝试从商店加载'sector'时，我得到：
store['/sector']
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-24-7fea069742ed> in <module>()
----> 1 store['/sector']
C:\Anaconda\lib\site-packages\pandas\io\pytables.pyc in __getitem__(self, key)
236
237 def __getitem__(self, key):
--> 238 return self.get(key)
239
240 def __setitem__(self, key, value):
C:\Anaconda\lib\site-packages\pandas\io\pytables.pyc in get(self, key)
369 if group is None:
370 raise KeyError('No object named %s in the file' % key)
--> 371 return self._read_group(group)
372
373 def select(self, key, where=None, start=None, stop=None, columns=None, iterator=False, chunksize=None, **kwargs):
C:\Anaconda\lib\site-packages\pandas\io\pytables.pyc in _read_group(self, group, **kwargs)
876 s = self._create_storer(group)
877 s.infer_axes()
--> 878 return s.read(**kwargs)
879
880 class TableIterator(object):
C:\Anaconda\lib\site-packages\pandas\io\pytables.pyc in read(self, **kwargs)
1982 blocks = []
1983 for i in range(self.nblocks):
-> 1984 blk_items = self.read_index('block%d_items' % i)
1985 values = self.read_array('block%d_values' % i)
1986 blk = make_block(values, blk_items, items)
C:\Anaconda\lib\site-packages\pandas\io\pytables.pyc in read_index(self, key)
1615 return self.read_sparse_intindex(key)
1616 elif variety == 'regular':
-> 1617 _, index = self.read_index_node(getattr(self.group, key))
1618 return index
1619 else: # pragma: no cover
C:\Anaconda\lib\site-packages\pandas\io\pytables.pyc in read_index_node(self, node)
1733 **kwargs)
1734 else:
-> 1735 index = factory(_unconvert_index(data, kind), **kwargs)
1736
1737 index.name = name
TypeError: __new__() got an unexpected keyword argument 'freq'
这个“频率”论点是什么？为什么它阻止我加载数据？