def _convert_listlike(arg, unit='ns', box=True, errors='raise', name=None):
"""Convert a list of objects to a timedelta index object."""
if isinstance(arg, (list, tuple)) or not hasattr(arg, 'dtype'):
arg = np.array(list(arg), dtype='O')
# these are shortcut-able
if is_timedelta64_dtype(arg):
value = arg.astype('timedelta64[ns]')
elif is_integer_dtype(arg):
value = arg.astype('timedelta64[{0}]'.format(
unit)).astype('timedelta64[ns]', copy=False)
else:
try:
value = tslib.array_to_timedelta64(_ensure_object(arg),
unit=unit, errors=errors)
value = value.astype('timedelta64[ns]', copy=False)
except ValueError:
if errors == 'ignore':
return arg
else:
# This else-block accounts for the cases when errors='raise'
# and errors='coerce'. If errors == 'raise', these errors
# should be raised. If errors == 'coerce', we shouldn't
# expect any errors to be raised, since all parsing errors
# cause coercion to pd.NaT. However, if an error / bug is
# introduced that causes an Exception to be raised, we would
# like to surface it.
raise
if box:
from pandas import TimedeltaIndex
value = TimedeltaIndex(value, unit='ns', name=name)
return value
def _convert_listlike(arg, unit='ns', box=True, errors='raise', name=None):
"""Convert a list of objects to a timedelta index object."""
if isinstance(arg, (list, tuple)) or not hasattr(arg, 'dtype'):
arg = np.array(list(arg), dtype='O')
# these are shortcut-able
if is_timedelta64_dtype(arg):
value = arg.astype('timedelta64[ns]')
elif is_integer_dtype(arg):
value = arg.astype('timedelta64[{unit}]'.format(unit=unit)).astype(
'timedelta64[ns]', copy=False)
else:
try:
value = tslib.array_to_timedelta64(_ensure_object(arg),
unit=unit,
errors=errors)
value = value.astype('timedelta64[ns]', copy=False)
except ValueError:
if errors == 'ignore':
return arg
else:
# This else-block accounts for the cases when errors='raise'
# and errors='coerce'. If errors == 'raise', these errors
# should be raised. If errors == 'coerce', we shouldn't
# expect any errors to be raised, since all parsing errors
# cause coercion to pd.NaT. However, if an error / bug is
# introduced that causes an Exception to be raised, we would
# like to surface it.
raise
if box:
from pandas import TimedeltaIndex
value = TimedeltaIndex(value, unit='ns', name=name)
return value
def _simple_new(cls, values, name=None, freq=None, **kwargs):
values = np.array(values, copy=False)
if values.dtype == np.object_:
values = libts.array_to_timedelta64(values)
if values.dtype != _TD_DTYPE:
values = _ensure_int64(values).view(_TD_DTYPE)
result = object.__new__(cls)
result._data = values
result.name = name
result.freq = freq
result._reset_identity()
return result
def _simple_new(cls, values, name=None, freq=None, **kwargs):
values = np.array(values, copy=False)
if values.dtype == np.object_:
values = libts.array_to_timedelta64(values)
if values.dtype != _TD_DTYPE:
values = _ensure_int64(values).view(_TD_DTYPE)
result = object.__new__(cls)
result._data = values
result.name = name
result.freq = freq
result._reset_identity()
return result
