def test_open_ctable():
with temp_dir() as temp:
# Create an table on disk
table_filename = os.path.join(temp, 'ctable')
p = params(storage=table_filename)
ds = dshape('1,{ x: int32; y: int32 }')
t = CTableSource(data=[(1, 1), (2, 2)], dshape=ds, params=p)
del t
# Open table with open function
uri = 'ctable://' + table_filename
c = toplevel.open(uri)
assert c.datashape == ds
# Test delayed mode
c = toplevel.open(uri, eclass=eclass.delayed)
assert c.datashape == ds
def __init__(self,
data,
dshape=None,
metadata=None,
layout=None,
params=None):
# Datashape
# ---------
if isinstance(dshape, basestring):
dshape = _dshape(dshape)
if not dshape:
# The user just passed in a raw data source, try
# and infer how it should be layed out or fail
# back on dynamic types.
self._datashape = dshape = CTableSource.infer_datashape(data)
else:
# The user overlayed their custom dshape on this
# data, check if it makes sense
CTableSource.check_datashape(data, given_dshape=dshape)
self._datashape = dshape
# Source
# ------
if isinstance(data, ByteProvider):
self.data = data
if isinstance(data, dict):
ct = self.from_dict(data)
self._axes = data.keys()
dshape = from_numpy(ct.shape, ct.dtype)
self.data = CTableSource(ct, dshape=dshape, params=params)
self._datashape = dshape
elif isinstance(data, (list, tuple)):
self.data = CTableSource(data, dshape=dshape, params=params)
# Pull the labels from the datashape
self._axes = self._datashape[-1].names
else:
raise ValueError
# children graph nodes
self.children = []
self.space = Space(self.data)
# Layout
# ------
if layout:
self._layout = layout
elif not layout:
self._layout = self.data.default_layout()
# Metadata
# --------
self._metadata = NDTable._metaheader + (metadata or [])
# Parameters
# ----------
self.params = params
def __getitem__(self, mask):
ct = (self.data.ca[mask])
dshape = from_numpy(ct.shape, ct.dtype)
source = CTableSource(ct, dshape=dshape)
return Table(source, dshape=dshape)