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spaCy/website/docs/api/cython-structs.mdx
Sofie Van Landeghem 554df9ef20
Website migration from Gatsby to Next (#12058) 
* Rename all MDX file to `.mdx`

* Lock current node version (#11885)

* Apply Prettier (#11996)

* Minor website fixes (#11974) [ci skip]

* fix table

* Migrate to Next WEB-17 (#12005)

* Initial commit

* Run `npx create-next-app@13 next-blog`

* Install MDX packages

Following: 77b5f79a4d/packages/next-mdx/readme.md

* Add MDX to Next

* Allow Next to handle `.md` and `.mdx` files.

* Add VSCode extension recommendation

* Disabled TypeScript strict mode for now

* Add prettier

* Apply Prettier to all files

* Make sure to use correct Node version

* Add basic implementation for `MDXRemote`

* Add experimental Rust MDX parser

* Add `/public`

* Add SASS support

* Remove default pages and styling

* Convert to module

This allows to use `import/export` syntax

* Add import for custom components

* Add ability to load plugins

* Extract function

This will make the next commit easier to read

* Allow to handle directories for page creation

* Refactoring

* Allow to parse subfolders for pages

* Extract logic

* Redirect `index.mdx` to parent directory

* Disabled ESLint during builds

* Disabled typescript during build

* Remove Gatsby from `README.md`

* Rephrase Docker part of `README.md`

* Update project structure in `README.md`

* Move and rename plugins

* Update plugin for wrapping sections

* Add dependencies for  plugin

* Use  plugin

* Rename wrapper type

* Simplify unnessary adding of id to sections

The slugified section ids are useless, because they can not be referenced anywhere anyway. The navigation only works if the section has the same id as the heading.

* Add plugin for custom attributes on Markdown elements

* Add plugin to readd support for tables

* Add plugin to fix problem with wrapped images

For more details see this issue: https://github.com/mdx-js/mdx/issues/1798

* Add necessary meta data to pages

* Install necessary dependencies

* Remove outdated MDX handling

* Remove reliance on `InlineList`

* Use existing Remark components

* Remove unallowed heading

Before `h1` components where not overwritten and would never have worked and they aren't used anywhere either.

* Add missing components to MDX

* Add correct styling

* Fix broken list

* Fix broken CSS classes

* Implement layout

* Fix links

* Fix broken images

* Fix pattern image

* Fix heading attributes

* Rename heading attribute

`new` was causing some weird issue, so renaming it to `version`

* Update comment syntax in MDX

* Merge imports

* Fix markdown rendering inside components

* Add model pages

* Simplify anchors

* Fix default value for theme

* Add Universe index page

* Add Universe categories

* Add Universe projects

* Fix Next problem with copy

Next complains when the server renders something different then the client, therfor we move the differing logic to `useEffect`

* Fix improper component nesting

Next doesn't allow block elements inside a `<p>`

* Replace landing page MDX with page component

* Remove inlined iframe content

* Remove ability to inline HTML content in iFrames

* Remove MDX imports

* Fix problem with image inside link in MDX

* Escape character for MDX

* Fix unescaped characters in MDX

* Fix headings with logo

* Allow to export static HTML pages

* Add prebuild script

This command is automatically run by Next

* Replace `svg-loader` with `react-inlinesvg`

`svg-loader` is no longer maintained

* Fix ESLint `react-hooks/exhaustive-deps`

* Fix dropdowns

* Change code language from `cli` to `bash`

* Remove unnessary language `none`

* Fix invalid code language

`markdown_` with an underscore was used to basically turn of syntax highlighting, but using unknown languages know throws an error.

* Enable code blocks plugin

* Readd `InlineCode` component

MDX2 removed the `inlineCode` component

> The special component name `inlineCode` was removed, we recommend to use `pre` for the block version of code, and code for both the block and inline versions

Source: https://mdxjs.com/migrating/v2/#update-mdx-content

* Remove unused code

* Extract function to own file

* Fix code syntax highlighting

* Update syntax for code block meta data

* Remove unused prop

* Fix internal link recognition

There is a problem with regex between Node and browser, and since Next runs the component on both, this create an error.

`Prop `rel` did not match. Server: "null" Client: "noopener nofollow noreferrer"`

This simplifies the implementation and fixes the above error.

* Replace `react-helmet` with `next/head`

* Fix `className` problem for JSX component

* Fix broken bold markdown

* Convert file to `.mjs` to be used by Node process

* Add plugin to replace strings

* Fix custom table row styling

* Fix problem with `span` inside inline `code`

React doesn't allow a `span` inside an inline `code` element and throws an error in dev mode.

* Add `_document` to be able to customize `<html>` and `<body>`

* Add `lang="en"`

* Store Netlify settings in file

This way we don't need to update via Netlify UI, which can be tricky if changing build settings.

* Add sitemap

* Add Smartypants

* Add PWA support

* Add `manifest.webmanifest`

* Fix bug with anchor links after reloading

There was no need for the previous implementation, since the browser handles this nativly. Additional the manual scrolling into view was actually broken, because the heading would disappear behind the menu bar.

* Rename custom event

I was googeling for ages to find out what kind of event `inview` is, only to figure out it was a custom event with a name that sounds pretty much like a native one. 🫠

* Fix missing comment syntax highlighting

* Refactor Quickstart component

The previous implementation was hidding the irrelevant lines via data-props and dynamically generated CSS. This created problems with Next and was also hard to follow. CSS was used to do what React is supposed to handle.

The new implementation simplfy filters the list of children (React elements) via their props.

* Fix syntax highlighting for Training Quickstart

* Unify code rendering

* Improve error logging in Juniper

* Fix Juniper component

* Automatically generate "Read Next" link

* Add Plausible

* Use recent DocSearch component and adjust styling

* Fix images

* Turn of image optimization

> Image Optimization using Next.js' default loader is not compatible with `next export`.

We currently deploy to Netlify via `next export`

* Dont build pages starting with `_`

* Remove unused files

* Add Next plugin to Netlify

* Fix button layout

MDX automatically adds `p` tags around text on a new line and Prettier wants to put the text on a new line. Hacking with JSX string.

* Add 404 page

* Apply Prettier

* Update Prettier for `package.json`

Next sometimes wants to patch `package-lock.json`. The old Prettier setting indended with 4 spaces, but Next always indends with 2 spaces. Since `npm install` automatically uses the indendation from `package.json` for `package-lock.json` and to avoid the format switching back and forth, both files are now set to 2 spaces.

* Apply Next patch to `package-lock.json`

When starting the dev server Next would warn `warn  - Found lockfile missing swc dependencies, patching...` and update the `package-lock.json`. These are the patched changes.

* fix link

Co-authored-by: Sofie Van Landeghem <svlandeg@users.noreply.github.com>

* small backslash fixes

* adjust to new style

Co-authored-by: Marcus Blättermann <marcus@essenmitsosse.de>
2023-01-11 17:30:07 +01:00

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---
title: Cython Structs
teaser: C-language objects that let you group variables together
next: /api/cython-classes
menu:
- ['TokenC', 'tokenc']
- ['LexemeC', 'lexemec']
---
## TokenC {id="tokenc",tag="C struct",source="spacy/structs.pxd"}
Cython data container for the `Token` object.
> #### Example
>
> ```python
> token = &doc.c[3]
> token_ptr = &doc.c[3]
> ```
| Name | Description |
| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `lex` | A pointer to the lexeme for the token. ~~const LexemeC\*~~ |
| `morph` | An ID allowing lookup of morphological attributes. ~~uint64_t~~ |
| `pos` | Coarse-grained part-of-speech tag. ~~univ_pos_t~~ |
| `spacy` | A binary value indicating whether the token has trailing whitespace. ~~bint~~ |
| `tag` | Fine-grained part-of-speech tag. ~~attr_t (uint64_t)~~ |
| `idx` | The character offset of the token within the parent document. ~~int~~ |
| `lemma` | Base form of the token, with no inflectional suffixes. ~~attr_t (uint64_t)~~ |
| `sense` | Space for storing a word sense ID, currently unused. ~~attr_t (uint64_t)~~ |
| `head` | Offset of the syntactic parent relative to the token. ~~int~~ |
| `dep` | Syntactic dependency relation. ~~attr_t (uint64_t)~~ |
| `l_kids` | Number of left children. ~~uint32_t~~ |
| `r_kids` | Number of right children. ~~uint32_t~~ |
| `l_edge` | Offset of the leftmost token of this token's syntactic descendants. ~~uint32_t~~ |
| `r_edge` | Offset of the rightmost token of this token's syntactic descendants. ~~uint32_t~~ |
| `sent_start` | Ternary value indicating whether the token is the first word of a sentence. `0` indicates a missing value, `-1` indicates `False` and `1` indicates `True`. The default value, 0, is interpreted as no sentence break. Sentence boundary detectors will usually set 0 for all tokens except tokens that follow a sentence boundary. ~~int~~ |
| `ent_iob` | IOB code of named entity tag. `0` indicates a missing value, `1` indicates `I`, `2` indicates `0` and `3` indicates `B`. ~~int~~ |
| `ent_type` | Named entity type. ~~attr_t (uint64_t)~~ |
| `ent_id` | ID of the entity the token is an instance of, if any. Currently not used, but potentially for coreference resolution. ~~attr_t (uint64_t)~~ |
### Token.get_struct_attr {id="token_get_struct_attr",tag="staticmethod, nogil",source="spacy/tokens/token.pxd"}
Get the value of an attribute from the `TokenC` struct by attribute ID.
> #### Example
>
> ```python
> from spacy.attrs cimport IS_ALPHA
> from spacy.tokens cimport Token
>
> is_alpha = Token.get_struct_attr(&doc.c[3], IS_ALPHA)
> ```
| Name | Description |
| ----------- | ---------------------------------------------------------------------------------------------------- |
| `token` | A pointer to a `TokenC` struct. ~~const TokenC\*~~ |
| `feat_name` | The ID of the attribute to look up. The attributes are enumerated in `spacy.typedefs`. ~~attr_id_t~~ |
| **RETURNS** | The value of the attribute. ~~attr_t (uint64_t)~~ |
### Token.set_struct_attr {id="token_set_struct_attr",tag="staticmethod, nogil",source="spacy/tokens/token.pxd"}
Set the value of an attribute of the `TokenC` struct by attribute ID.
> #### Example
>
> ```python
> from spacy.attrs cimport TAG
> from spacy.tokens cimport Token
>
> token = &doc.c[3]
> Token.set_struct_attr(token, TAG, 0)
> ```
| Name | Description |
| ----------- | ---------------------------------------------------------------------------------------------------- |
| `token` | A pointer to a `TokenC` struct. ~~const TokenC\*~~ |
| `feat_name` | The ID of the attribute to look up. The attributes are enumerated in `spacy.typedefs`. ~~attr_id_t~~ |
| `value` | The value to set. ~~attr_t (uint64_t)~~ |
### token_by_start {id="token_by_start",tag="function",source="spacy/tokens/doc.pxd"}
Find a token in a `TokenC*` array by the offset of its first character.
> #### Example
>
> ```python
> from spacy.tokens.doc cimport Doc, token_by_start
> from spacy.vocab cimport Vocab
>
> doc = Doc(Vocab(), words=["hello", "world"])
> assert token_by_start(doc.c, doc.length, 6) == 1
> assert token_by_start(doc.c, doc.length, 4) == -1
> ```
| Name | Description |
| ------------ | ----------------------------------------------------------------- |
| `tokens` | A `TokenC*` array. ~~const TokenC\*~~ |
| `length` | The number of tokens in the array. ~~int~~ |
| `start_char` | The start index to search for. ~~int~~ |
| **RETURNS** | The index of the token in the array or `-1` if not found. ~~int~~ |
### token_by_end {id="token_by_end",tag="function",source="spacy/tokens/doc.pxd"}
Find a token in a `TokenC*` array by the offset of its final character.
> #### Example
>
> ```python
> from spacy.tokens.doc cimport Doc, token_by_end
> from spacy.vocab cimport Vocab
>
> doc = Doc(Vocab(), words=["hello", "world"])
> assert token_by_end(doc.c, doc.length, 5) == 0
> assert token_by_end(doc.c, doc.length, 1) == -1
> ```
| Name | Description |
| ----------- | ----------------------------------------------------------------- |
| `tokens` | A `TokenC*` array. ~~const TokenC\*~~ |
| `length` | The number of tokens in the array. ~~int~~ |
| `end_char` | The end index to search for. ~~int~~ |
| **RETURNS** | The index of the token in the array or `-1` if not found. ~~int~~ |
### set_children_from_heads {id="set_children_from_heads",tag="function",source="spacy/tokens/doc.pxd"}
Set attributes that allow lookup of syntactic children on a `TokenC*` array.
This function must be called after making changes to the `TokenC.head`
attribute, in order to make the parse tree navigation consistent.
> #### Example
>
> ```python
> from spacy.tokens.doc cimport Doc, set_children_from_heads
> from spacy.vocab cimport Vocab
>
> doc = Doc(Vocab(), words=["Baileys", "from", "a", "shoe"])
> doc.c[0].head = 0
> doc.c[1].head = 0
> doc.c[2].head = 3
> doc.c[3].head = 1
> set_children_from_heads(doc.c, doc.length)
> assert doc.c[3].l_kids == 1
> ```
| Name | Description |
| -------- | ------------------------------------------ |
| `tokens` | A `TokenC*` array. ~~const TokenC\*~~ |
| `length` | The number of tokens in the array. ~~int~~ |
## LexemeC {id="lexemec",tag="C struct",source="spacy/structs.pxd"}
Struct holding information about a lexical type. `LexemeC` structs are usually
owned by the `Vocab`, and accessed through a read-only pointer on the `TokenC`
struct.
> #### Example
>
> ```python
> lex = doc.c[3].lex
> ```
| Name | Description |
| -------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
| `flags` | Bit-field for binary lexical flag values. ~~flags_t (uint64_t)~~ |
| `id` | Usually used to map lexemes to rows in a matrix, e.g. for word vectors. Does not need to be unique, so currently misnamed. ~~attr_t (uint64_t)~~ |
| `length` | Number of unicode characters in the lexeme. ~~attr_t (uint64_t)~~ |
| `orth` | ID of the verbatim text content. ~~attr_t (uint64_t)~~ |
| `lower` | ID of the lowercase form of the lexeme. ~~attr_t (uint64_t)~~ |
| `norm` | ID of the lexeme's norm, i.e. a normalized form of the text. ~~attr_t (uint64_t)~~ |
| `shape` | Transform of the lexeme's string, to show orthographic features. ~~attr_t (uint64_t)~~ |
| `prefix` | Length-N substring from the start of the lexeme. Defaults to `N=1`. ~~attr_t (uint64_t)~~ |
| `suffix` | Length-N substring from the end of the lexeme. Defaults to `N=3`. ~~attr_t (uint64_t)~~ |
### Lexeme.get_struct_attr {id="lexeme_get_struct_attr",tag="staticmethod, nogil",source="spacy/lexeme.pxd"}
Get the value of an attribute from the `LexemeC` struct by attribute ID.
> #### Example
>
> ```python
> from spacy.attrs cimport IS_ALPHA
> from spacy.lexeme cimport Lexeme
>
> lexeme = doc.c[3].lex
> is_alpha = Lexeme.get_struct_attr(lexeme, IS_ALPHA)
> ```
| Name | Description |
| ----------- | ---------------------------------------------------------------------------------------------------- |
| `lex` | A pointer to a `LexemeC` struct. ~~const LexemeC\*~~ |
| `feat_name` | The ID of the attribute to look up. The attributes are enumerated in `spacy.typedefs`. ~~attr_id_t~~ |
| **RETURNS** | The value of the attribute. ~~attr_t (uint64_t)~~ |
### Lexeme.set_struct_attr {id="lexeme_set_struct_attr",tag="staticmethod, nogil",source="spacy/lexeme.pxd"}
Set the value of an attribute of the `LexemeC` struct by attribute ID.
> #### Example
>
> ```python
> from spacy.attrs cimport NORM
> from spacy.lexeme cimport Lexeme
>
> lexeme = doc.c[3].lex
> Lexeme.set_struct_attr(lexeme, NORM, lexeme.lower)
> ```
| Name | Description |
| ----------- | ---------------------------------------------------------------------------------------------------- |
| `lex` | A pointer to a `LexemeC` struct. ~~const LexemeC\*~~ |
| `feat_name` | The ID of the attribute to look up. The attributes are enumerated in `spacy.typedefs`. ~~attr_id_t~~ |
| `value` | The value to set. ~~attr_t (uint64_t)~~ |
### Lexeme.c_check_flag {id="lexeme_c_check_flag",tag="staticmethod, nogil",source="spacy/lexeme.pxd"}
Check the value of a binary flag attribute.
> #### Example
>
> ```python
> from spacy.attrs cimport IS_STOP
> from spacy.lexeme cimport Lexeme
>
> lexeme = doc.c[3].lex
> is_stop = Lexeme.c_check_flag(lexeme, IS_STOP)
> ```
| Name | Description |
| ----------- | --------------------------------------------------------------------------------------------- |
| `lexeme` | A pointer to a `LexemeC` struct. ~~const LexemeC\*~~ |
| `flag_id` | The ID of the flag to look up. The flag IDs are enumerated in `spacy.typedefs`. ~~attr_id_t~~ |
| **RETURNS** | The boolean value of the flag. ~~bint~~ |
### Lexeme.c_set_flag {id="lexeme_c_set_flag",tag="staticmethod, nogil",source="spacy/lexeme.pxd"}
Set the value of a binary flag attribute.
> #### Example
>
> ```python
> from spacy.attrs cimport IS_STOP
> from spacy.lexeme cimport Lexeme
>
> lexeme = doc.c[3].lex
> Lexeme.c_set_flag(lexeme, IS_STOP, 0)
> ```
| Name | Description |
| --------- | --------------------------------------------------------------------------------------------- |
| `lexeme` | A pointer to a `LexemeC` struct. ~~const LexemeC\*~~ |
| `flag_id` | The ID of the flag to look up. The flag IDs are enumerated in `spacy.typedefs`. ~~attr_id_t~~ |
| `value` | The value to set. ~~bint~~ |
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