def __init__(self, columns=None, names=None, **kwargs):
# Important optional params
self._cparams = kwargs.get("cparams", bcolz.cparams())
self.rootdir = kwargs.get("rootdir", None)
"The directory where this object is saved."
if self.rootdir is None and columns is None:
raise ValueError("For creating a new ctable you should pass a `columns` param")
if os.path.exists(self.rootdir):
self.mode = kwargs.setdefault("mode", "a")
else:
self.mode = kwargs.setdefault("mode", "w")
"The mode in which the object is created/opened."
# Setup the columns accessor
self.cols = cols(self.rootdir, self.mode)
"The ctable columns accessor."
# The length counter of this array
self.len = 0
# Create a new ctable or open it from disk
if self.mode in ("r", "a"):
self.open_ctable()
_new = False
elif columns is not None:
self.create_ctable(columns, names, **kwargs)
_new = True
# Attach the attrs to this object
self.attrs = attrs.attrs(self.rootdir, self.mode, _new=_new)
# Cache a structured array of len 1 for ctable[int] acceleration
self._arr1 = np.empty(shape=(1,), dtype=self.dtype)
def __init__(self, columns=None, names=None, **kwargs):
# Important optional params
self._cparams = kwargs.get('cparams', bcolz.cparams())
self.rootdir = kwargs.get('rootdir', None)
if self.rootdir is not None:
self.auto_flush = kwargs.pop('auto_flush', True)
else:
self.auto_flush = False
# We actually need to pop it from the kwargs, so it doesn't get
# passed down to the carray.
try:
kwargs.pop('auto_flush')
except KeyError:
pass
"The directory where this object is saved."
if self.rootdir is None and columns is None:
raise ValueError(
"You should pass either a `columns` or a `rootdir` param"
" at very least")
# The mode in which the object is created/opened
if self.rootdir is not None and os.path.exists(self.rootdir):
self.mode = kwargs.setdefault('mode', 'a')
if columns is not None and self.mode == 'a':
raise ValueError(
"You cannot pass a `columns` param in 'a'ppend mode.\n"
"(If you are trying to create a new ctable, perhaps the "
"directory exists already.)")
else:
self.mode = kwargs.setdefault('mode', 'w')
# Setup the columns accessor
self.cols = cols(self.rootdir, self.mode)
"The ctable columns accessor."
# The length counter of this array
self.len = 0
# Create a new ctable or open it from disk
_new = False
if self.mode in ('r', 'a'):
self._open_ctable()
elif columns is not None:
self._create_ctable(columns, names, **kwargs)
_new = True
else:
raise ValueError(
"You cannot open a ctable in 'w'rite mode"
" without a `columns` param")
# Attach the attrs to this object
self.attrs = attrs.attrs(self.rootdir, self.mode, _new=_new)
# Cache a structured array of len 1 for ctable[int] acceleration
self._arr1 = np.empty(shape=(1,), dtype=self.dtype)
