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  • Getting started
  • User guide
  • API reference
  • Contributor guide
  • Release history
  • GitHub
  • PyPI
  • Gitter

Section Navigation

High-level data types

  • ak.Array
  • ak.Record

Converting untyped data

  • ak.from_iter
  • ak.to_list
  • ak.from_json
  • ak.to_json

Converting rectangular arrays

  • ak.from_numpy
  • ak.to_numpy
  • ak.from_cupy
  • ak.to_cupy
  • ak.from_dlpack
  • ak.from_jax
  • ak.to_jax

Reading and writing files

  • ak.from_parquet
  • ak.metadata_from_parquet
  • ak.to_parquet
  • ak.to_parquet_dataset
  • ak.to_parquet_row_groups
  • ak.from_arrow
  • ak.from_arrow_schema
  • ak.to_arrow
  • ak.to_arrow_table
  • ak.from_feather
  • ak.to_feather
  • ak.from_avro_file
  • ak.to_safetensors
  • ak.from_safetensors

Conversions for machine learning

  • ak.from_raggedtensor
  • ak.to_raggedtensor
  • ak.from_tensorflow
  • ak.to_tensorflow
  • ak.from_torch
  • ak.to_torch

Converting to Pandas DataFrames

  • ak.to_dataframe

Converting to cuDF Series

  • ak.to_cudf

Converting ROOT RDataFrames

  • ak.from_rdataframe
  • ak.to_rdataframe

Append-only builder

  • ak.ArrayBuilder

Low-level conversion primitives

  • ak.from_buffers
  • ak.to_buffers
  • ak.to_packed
  • ak.copy

Materializing virtual arrays

  • ak.materialize

Validity checking

  • ak.is_valid
  • ak.validity_error

Restructuring records (columns)

  • ak.zip
  • ak.zip_no_broadcast
  • ak.unzip
  • ak.merge_union_of_records
  • ak.merge_option_of_records

Merging arrays (rows)

  • ak.concatenate
  • ak.where

Flattening lists and missing values

  • ak.flatten
  • ak.unflatten
  • ak.ravel

Lengths of lists

  • ak.num
  • ak.count

Reducers

  • ak.count_nonzero
  • ak.sum
  • ak.nansum
  • ak.prod
  • ak.nanprod
  • ak.any
  • ak.all

Minimum and maximum

  • ak.min
  • ak.nanmin
  • ak.max
  • ak.nanmax
  • ak.argmin
  • ak.nanargmin
  • ak.argmax
  • ak.nanargmax

Descriptive statistics

  • ak.moment
  • ak.mean
  • ak.nanmean
  • ak.var
  • ak.nanvar
  • ak.std
  • ak.nanstd
  • ak.covar
  • ak.corr
  • ak.linear_fit
  • ak.ptp
  • ak.softmax

Sorting

  • ak.sort
  • ak.argsort

Missing value handling

  • ak.mask
  • ak.is_none
  • ak.drop_none
  • ak.pad_none
  • ak.fill_none
  • ak.firsts
  • ak.singletons

Ragged and regular dimensions

  • ak.from_regular
  • ak.to_regular

Broadcasting

  • ak.broadcast_arrays
  • ak.broadcast_fields

Combinatorics ("for loop" replacements)

  • ak.cartesian
  • ak.argcartesian
  • ak.combinations
  • ak.argcombinations

String predicates

  • ak.str.is_alnum
  • ak.str.is_alpha
  • ak.str.is_ascii
  • ak.str.is_decimal
  • ak.str.is_digit
  • ak.str.is_lower
  • ak.str.is_numeric
  • ak.str.is_printable
  • ak.str.is_space
  • ak.str.is_title
  • ak.str.is_upper

String transforms

  • ak.str.capitalize
  • ak.str.length
  • ak.str.lower
  • ak.str.repeat
  • ak.str.replace_slice
  • ak.str.replace_substring
  • ak.str.replace_substring_regex
  • ak.str.reverse
  • ak.str.swapcase
  • ak.str.title
  • ak.str.upper

String padding and trimming

  • ak.str.center
  • ak.str.lpad
  • ak.str.rpad
  • ak.str.ltrim
  • ak.str.ltrim_whitespace
  • ak.str.rtrim
  • ak.str.rtrim_whitespace
  • ak.str.trim
  • ak.str.trim_whitespace

String splitting and joining

  • ak.str.split_pattern
  • ak.str.split_pattern_regex
  • ak.str.split_whitespace
  • ak.str.join
  • ak.str.join_element_wise

String slicing and decomposition

  • ak.str.slice
  • ak.str.extract_regex

String containment tests

  • ak.str.count_substring
  • ak.str.count_substring_regex
  • ak.str.ends_with
  • ak.str.find_substring
  • ak.str.find_substring_regex
  • ak.str.index_in
  • ak.str.is_in
  • ak.str.match_like
  • ak.str.match_substring
  • ak.str.match_substring_regex
  • ak.str.starts_with

Value and type conversions

  • ak.enforce_type
  • ak.nan_to_none
  • ak.nan_to_num
  • ak.values_astype
  • ak.strings_astype

Arrays of categorical data

  • ak.from_categorical
  • ak.is_categorical
  • ak.categories
  • ak.str.to_categorical

Indexing and grouping

  • ak.local_index
  • ak.run_lengths

Extracting type metadata

  • ak.type
  • ak.parameters
  • ak.fields
  • ak.is_tuple

Manipulating type metadata

  • ak.with_name
  • ak.with_field
  • ak.without_field
  • ak.with_parameter
  • ak.without_parameters
  • ak.with_named_axis
  • ak.without_named_axis

Overriding behavior

  • ak.behavior
  • ak.mixin_class
  • ak.mixin_class_method

Computational backends

  • ak.to_backend
  • ak.backend

Approximation and comparison

  • ak.round
  • ak.isclose
  • ak.almost_equal
  • ak.array_equal

NumPy compatibility

  • ak.real
  • ak.imag
  • ak.angle
  • ak.zeros_like
  • ak.ones_like
  • ak.full_like

Third-party integration

  • ak.numba.register_and_check
  • ak.jax.assert_registered
  • ak.jax.import_jax
  • ak.jax.register_and_check
  • ak.jax.register_behavior_class

High-level data types

  • ak.types.Type
  • ak.types.ArrayType
  • ak.types.ScalarType
  • ak.types.ListType
  • ak.types.NumpyType
  • ak.types.OptionType
  • ak.types.RecordType
  • ak.types.RegularType
  • ak.types.UnionType
  • ak.types.UnknownType
  • ak.types.from_datashape
  • ak.types.is_primitive
  • ak.types.primitive_to_dtype
  • ak.types.dtype_to_primitive

Low-level array layouts

  • ak.contents.Content
  • ak.contents.BitMaskedArray
  • ak.contents.ByteMaskedArray
  • ak.contents.EmptyArray
  • ak.contents.IndexedArray
  • ak.contents.IndexedOptionArray
  • ak.contents.ListArray
  • ak.contents.ListOffsetArray
  • ak.contents.NumpyArray
  • ak.contents.RecordArray
  • ak.contents.RegularArray
  • ak.contents.UnionArray
  • ak.contents.UnmaskedArray
  • ak.record.Record
  • ak.to_layout
  • ak.transform

Index for layout nodes

  • ak.index.Index
  • ak.index.Index8
  • ak.index.IndexU8
  • ak.index.Index32
  • ak.index.IndexU32
  • ak.index.Index64

Low-level types: "forms"

  • ak.forms.Form
  • ak.forms.BitMaskedForm
  • ak.forms.ByteMaskedForm
  • ak.forms.EmptyForm
  • ak.forms.IndexedForm
  • ak.forms.IndexedOptionForm
  • ak.forms.ListForm
  • ak.forms.ListOffsetForm
  • ak.forms.NumpyForm
  • ak.forms.RecordForm
  • ak.forms.RegularForm
  • ak.forms.UnionForm
  • ak.forms.UnmaskedForm
  • ak.forms.from_dict
  • ak.forms.from_json
  • ak.forms.from_type

Low-level data ingest

  • AwkwardForth virtual machines

Low-level kernels

  • Kernel interface and specification
  • API reference
  • ak.forms.from_json

ak.forms.from_json#

Defined in awkward.forms.form on line 206.

ak.forms.from_json(input: str) → Form#

previous

ak.forms.from_dict

next

ak.forms.from_type
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  • ak.forms.from_json()
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Support for this work was provided by NSF cooperative agreement OAC-1836650 (IRIS-HEP 1), PHY-2323298 (IRIS-HEP 2), grant OAC-1450377 (DIANA/HEP), PHY-1520942 and PHY-2121686 (US-CMS LHC Ops), and OAC-2103945 (Awkward Array).

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