daft.DataType#

class daft.DataType[source]#

A Daft DataType defines the type of all the values in an Expression or DataFrame column

__init__() → None[source]#

Methods

__init__()

binary()

Create a Binary DataType: A string of bytes

bool()

Create the Boolean DataType: Either True or False

date()

Create a Date DataType: A date with a year, month and day

decimal128(precision, scale)

Fixed-precision decimal.

duration(timeunit)

Duration DataType.

embedding(dtype, size)

Create an Embedding DataType: embeddings are fixed size arrays, where each element in the array has a numeric dtype and each array has a fixed length of size.

extension(name, storage_dtype[, metadata])

fixed_size_list(dtype, size)

Create a FixedSizeList DataType: Fixed-size list, where each element in the list has type dtype and each list has length size.

float32()

Create a 32-bit float DataType

float64()

Create a 64-bit float DataType

from_arrow_type(arrow_type)

Maps a PyArrow DataType to a Daft DataType

from_numpy_dtype(np_type)

Maps a Numpy datatype to a Daft DataType

image([mode, height, width])

Create an Image DataType: image arrays contain (height, width, channel) ndarrays of pixel values.

int16()

Create an 16-bit integer DataType

int32()

Create an 32-bit integer DataType

int64()

Create an 64-bit integer DataType

int8()

Create an 8-bit integer DataType

list(dtype)

Create a List DataType: Variable-length list, where each element in the list has type dtype

null()

Creates the Null DataType: Always the Null value

python()

Create a Python DataType: a type which refers to an arbitrary Python object

string()

Create a String DataType: A string of UTF8 characters

struct(fields)

Create a Struct DataType: a nested type which has names mapped to child types

tensor(dtype[, shape])

Create a tensor DataType: tensor arrays contain n-dimensional arrays of data of the provided dtype as elements, each of the provided shape.

timestamp(timeunit[, timezone])

Timestamp DataType.

to_arrow_dtype([cast_tensor_to_ray_type])

uint16()

Create an unsigned 16-bit integer DataType

uint32()

Create an unsigned 32-bit integer DataType

uint64()

Create an unsigned 64-bit integer DataType

uint8()

Create an unsigned 8-bit integer DataType