def _init_dict(self, data, axes, dtype=None):
items, major, minor = axes
# prefilter if items passed
if items is not None:
items = _ensure_index(items)
data = dict((k, v) for k, v in data.iteritems() if k in items)
else:
items = Index(_try_sort(data.keys()))
for k, v in data.iteritems():
if not isinstance(v, DataFrame):
data[k] = DataFrame(v)
if major is None:
indexes = [v.index for v in data.values()]
major = _union_indexes(indexes)
if minor is None:
indexes = [v.columns for v in data.values()]
minor = _union_indexes(indexes)
axes = [items, major, minor]
reshaped_data = data.copy() # shallow
# homogenize
item_shape = (1, len(major), len(minor))
for k in items:
if k not in data:
values = np.empty(item_shape, dtype=dtype)
values.fill(np.nan)
reshaped_data[k] = values
else:
v = data[k]
v = v.reindex(index=major, columns=minor, copy=False)
if dtype is not None:
v = v.astype(dtype)
values = v.values
shape = values.shape
reshaped_data[k] = values.reshape((1,) + shape)
# segregates dtypes and forms blocks matching to columns
blocks = form_blocks(reshaped_data, axes)
mgr = BlockManager(blocks, axes).consolidate()
return mgr
def _get_combined_index(frames, intersect=False):
from pandas.core.frame import _union_indexes
indexes = _get_distinct_indexes([df.index for df in frames.values()])
if len(indexes) == 1:
return indexes[0]
if intersect:
index = indexes[0]
for other in indexes[1:]:
index = index.intersection(other)
return index
union = _union_indexes(indexes)
return Index(union)
def _get_combined_index(frames, intersect=False):
from pandas.core.frame import _union_indexes
indexes = _get_distinct_indexes([df.index for df in frames.values()])
if len(indexes) == 1:
return indexes[0]
if intersect:
index = indexes[0]
for other in indexes[1:]:
index = index.intersection(other)
return index
union = _union_indexes(indexes)
return Index(union)