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numpyform.py
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numpyform.py
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# BSD 3-Clause License; see https://github.com/scikit-hep/awkward/blob/main/LICENSE
from __future__ import annotations
from collections.abc import Callable, Iterable, Iterator
import awkward as ak
from awkward._meta.numpymeta import NumpyMeta
from awkward._nplikes.numpy_like import NumpyMetadata
from awkward._nplikes.shape import unknown_length
from awkward._typing import TYPE_CHECKING, Any, DType, JSONMapping, Self, final
from awkward._util import UNSET
from awkward.forms.form import Form, _SpecifierMatcher
__all__ = ("NumpyForm",)
if TYPE_CHECKING:
from awkward.forms.regularform import RegularForm
np = NumpyMetadata.instance()
def from_dtype(
dtype,
parameters: JSONMapping | None = None,
*,
time_units_as_parameter: bool = False,
):
if dtype.subdtype is None:
inner_shape = ()
else:
inner_shape = dtype.shape
dtype = dtype.subdtype[0]
if time_units_as_parameter:
raise ValueError(
"`time_units_as_parameter=True` is no longer supported; NumPy's time units are no longer converted into Awkward parameters"
)
return NumpyForm(
primitive=ak.types.numpytype.dtype_to_primitive(dtype),
parameters=parameters,
inner_shape=inner_shape,
)
@final
class NumpyForm(NumpyMeta, Form):
def __init__(
self,
primitive,
inner_shape=(),
*,
parameters=None,
form_key=None,
):
primitive = ak.types.numpytype.dtype_to_primitive(
ak.types.numpytype.primitive_to_dtype(primitive)
)
if not isinstance(inner_shape, Iterable):
raise TypeError(
f"{type(self).__name__} 'inner_shape' must be iterable, not {inner_shape!r}"
)
self._primitive = primitive
self._inner_shape = tuple(inner_shape)
self._init(parameters=parameters, form_key=form_key)
@property
def primitive(self):
return self._primitive
@property
def inner_shape(self):
return self._inner_shape
def copy(
self,
primitive=UNSET,
inner_shape=UNSET,
*,
parameters=UNSET,
form_key=UNSET,
):
return NumpyForm(
self._primitive if primitive is UNSET else primitive,
self._inner_shape if inner_shape is UNSET else inner_shape,
parameters=self._parameters if parameters is UNSET else parameters,
form_key=self._form_key if form_key is UNSET else form_key,
)
@classmethod
def simplified(
cls,
primitive,
inner_shape=(),
*,
parameters=None,
form_key=None,
):
return cls(primitive, inner_shape, parameters=parameters, form_key=form_key)
@property
def itemsize(self):
return ak.types.numpytype.primitive_to_dtype(self._primitive).itemsize
def __repr__(self):
args = [repr(self._primitive)]
if len(self._inner_shape) > 0:
args.append("inner_shape=" + repr(self._inner_shape))
args += self._repr_args()
return "{}({})".format(type(self).__name__, ", ".join(args))
def _to_dict_part(self, verbose, toplevel):
if (
not verbose
and not toplevel
and len(self._inner_shape) == 0
and (self._parameters is None or len(self._parameters) == 0)
and self._form_key is None
):
return self._primitive
else:
out = {
"class": "NumpyArray",
"primitive": self._primitive,
}
if verbose or len(self._inner_shape) > 0:
out["inner_shape"] = [
None if item is unknown_length else item
for item in self._inner_shape
]
return self._to_dict_extra(out, verbose)
@property
def type(self):
out = ak.types.NumpyType(
self._primitive,
parameters=None,
)
for x in self._inner_shape[::-1]:
out = ak.types.RegularType(out, x)
out._parameters = self._parameters
return out
def to_RegularForm(self) -> RegularForm | NumpyForm:
out: RegularForm | NumpyForm = NumpyForm(
self._primitive, (), parameters=None, form_key=None
)
for x in self._inner_shape[::-1]:
out = ak.forms.RegularForm(out, x, parameters=None, form_key=None)
out._parameters = self._parameters
return out
def _columns(self, path, output, list_indicator):
output.append(".".join(path))
def _select_columns(self, match_specifier: _SpecifierMatcher) -> Self:
return self
def _prune_columns(self, is_inside_record_or_union: bool) -> Self:
return self
def _column_types(self):
return (ak.types.numpytype.primitive_to_dtype(self._primitive),)
def __setstate__(self, state):
if isinstance(state, dict):
# read data pickled in Awkward 2.x
self.__dict__.update(state)
else:
# read data pickled in Awkward 1.x
# https://github.com/scikit-hep/awkward/blob/main-v1/src/python/forms.cpp#L530-L537
has_identities, parameters, form_key, inner_shape, itemsize, format = state
# https://github.com/scikit-hep/awkward/blob/main-v1/src/libawkward/util.cpp#L131-L145
format = format.lstrip("<").lstrip(">").lstrip("=")
# https://github.com/scikit-hep/awkward/blob/main-v1/src/libawkward/util.cpp#L147-L222
if format == "?":
dtype = np.dtype(np.bool_)
elif format in ("b", "h", "i", "l", "q"):
if itemsize == 1:
dtype = np.dtype(np.int8)
elif itemsize == 2:
dtype = np.dtype(np.int16)
elif itemsize == 4:
dtype = np.dtype(np.int32)
elif itemsize == 8:
dtype = np.dtype(np.int64)
else:
raise AssertionError(format)
elif format in ("c", "B", "H", "I", "L", "Q"):
if itemsize == 1:
dtype = np.dtype(np.uint8)
elif itemsize == 2:
dtype = np.dtype(np.uint16)
elif itemsize == 4:
dtype = np.dtype(np.uint32)
elif itemsize == 8:
dtype = np.dtype(np.uint64)
else:
raise AssertionError(format)
elif format == "e":
dtype = np.dtype(np.float16)
elif format == "f":
dtype = np.dtype(np.float32)
elif format == "d":
dtype = np.dtype(np.float64)
elif format == "g":
dtype = np.dtype(np.float128)
elif format == "Zf":
dtype = np.dtype(np.complex64)
elif format == "Zd":
dtype = np.dtype(np.complex128)
elif format == "Zg":
dtype = np.dtype(np.complex256)
else:
dtype = np.dtype(format) # datetime or timedelta with units
primitive = ak.types.numpytype.dtype_to_primitive(dtype)
if form_key is not None:
form_key = "part0-" + form_key # only the first partition
self.__init__(
primitive, inner_shape, parameters=parameters, form_key=form_key
)
def _expected_from_buffers(
self, getkey: Callable[[Form, str], str], recursive: bool
) -> Iterator[tuple[str, DType]]:
from awkward.types.numpytype import primitive_to_dtype
yield (getkey(self, "data"), primitive_to_dtype(self.primitive))
def _is_equal_to(self, other: Any, all_parameters: bool, form_key: bool) -> bool:
return self._is_equal_to_generic(other, all_parameters, form_key) and (
self._primitive == other._primitive
)