# `unicodedata` — Unicode Database

This module provides access to the Unicode Character Database (UCD) which defines character properties for all Unicode characters. The data contained in this database is compiled from the UCD version 17.0.0.

The module uses the same names and symbols as defined by Unicode Standard Annex #44, «Unicode Character Database».

Дивись також

The Юнікод HOWTO for more information about Unicode and how to use this module.

Lookup
`lookup(name)` | Look up character by name
`name(chr)` | Return the name assigned to a character
Numeric values
`decimal(chr)` | Decimal value of a character
`digit(chr)` | Digit value of a character
`numeric(chr)` | Numeric value of a character
Properties
`bidirectional(chr)` | Bidirectional class of a character
`block(chr)` | Unicode block of a character
`category(chr)` | General category of a character
`combining(chr)` | Canonical combining class of a character
`decomposition(chr)` | Character decomposition mapping
`east_asian_width(chr)` | East Asian width of a character
`extended_pictographic(chr)` | Check if a character has the Extended_Pictographic property
`grapheme_cluster_break(chr)` | Grapheme_Cluster_Break property of a character
`indic_conjunct_break(chr)` | Indic_Conjunct_Break property of a character
`isxidcontinue(chr)` | Check if a character is a valid identifier continuation
`isxidstart(chr)` | Check if a character is a valid identifier start
`mirrored(chr)` | Mirrored property of a character
Normalization
`normalize(form, unistr)` | Return the normalized form of a string
`is_normalized(form, unistr)` | Check if a Unicode string is normalized
Text segmentation
`iter_graphemes(unistr)` | Iterate over grapheme clusters in a string

unicodedata.lookup(name, /)

  Look up character by name. If a character with the given name is found, return the corresponding character. If not found, `KeyError` is raised. For example:

      >>> unicodedata.lookup('LEFT CURLY BRACKET')
      '{'

  The characters returned by this function are the same as those produced by `\N` escape sequence in string literals. For example:

      >>> unicodedata.lookup('MIDDLE DOT') == '\N{MIDDLE DOT}'
      True

  Змінено в версії 3.3: Додано підтримку псевдонімів імен [1] та іменованих послідовностей [2].

unicodedata.name(chr, default=None, /)

  Returns the name assigned to the character chr as a string. If no name is defined, default is returned, or, if not given, `ValueError` is raised. For example:

      >>> unicodedata.name('½')
      'VULGAR FRACTION ONE HALF'
      >>> unicodedata.name('\uFFFF', 'fallback')
      'fallback'

unicodedata.decimal(chr, default=None, /)

  Returns the decimal value assigned to the character chr as integer. If no such value is defined, default is returned, or, if not given, `ValueError` is raised. For example:

      >>> unicodedata.decimal('\N{ARABIC-INDIC DIGIT NINE}')
      9
      >>> unicodedata.decimal('\N{SUPERSCRIPT NINE}', -1)
      -1

unicodedata.digit(chr, default=None, /)

  Returns the digit value assigned to the character chr as integer. If no such value is defined, default is returned, or, if not given, `ValueError` is raised:

      >>> unicodedata.digit('\N{SUPERSCRIPT NINE}')
      9

unicodedata.numeric(chr, default=None, /)

  Returns the numeric value assigned to the character chr as float. If no such value is defined, default is returned, or, if not given, `ValueError` is raised:

      >>> unicodedata.numeric('½')
      0.5

unicodedata.category(chr, /)

  Returns the general category assigned to the character chr as string. General category names consist of two letters. See the General Category Values section of the Unicode Character Database documentation for a list of category codes. For example:

      >>> unicodedata.category('A')  # 'L'etter, 'u'ppercase
      'Lu'

unicodedata.bidirectional(chr, /)

  Returns the bidirectional class assigned to the character chr as string. If no such value is defined, an empty string is returned. See the Bidirectional Class Values section of the Unicode Character Database documentation for a list of bidirectional codes. For example:

      >>> unicodedata.bidirectional('\N{ARABIC-INDIC DIGIT SEVEN}') # 'A'rabic, 'N'umber
      'AN'

unicodedata.combining(chr, /)

  Returns the canonical combining class assigned to the character chr as integer. Returns `0` if no combining class is defined. See the Canonical Combining Class Values section of the Unicode Character Database for more information.

unicodedata.east_asian_width(chr, /)

  Returns the east asian width assigned to the character chr as string. For a list of widths and or more information, see the Unicode Standard Annex #11.

unicodedata.block(chr, /)

  Returns the block assigned to the character chr. For example:

      >>> unicodedata.block('S')
      'Basic Latin'

  Added in version 3.15.

unicodedata.mirrored(chr, /)

  Returns the mirrored property assigned to the character chr as integer. Returns `1` if the character has been identified as a «mirrored» character in bidirectional text, `0` otherwise. For example:

      >>> unicodedata.mirrored('>')
      1

unicodedata.isxidstart(chr, /)

  Return `True` if chr is a valid identifier start per the Unicode Standard Annex #31, that is, it has the `XID_Start` property. Return `False` otherwise. For example:

      >>> unicodedata.isxidstart('S')
      True
      >>> unicodedata.isxidstart('0')
      False

  Added in version 3.15.

unicodedata.isxidcontinue(chr, /)

  Return `True` if chr is a valid identifier character per the Unicode Standard Annex #31, that is, it has the `XID_Continue` property. Return `False` otherwise. For example:

      >>> unicodedata.isxidcontinue('S')
      True
      >>> unicodedata.isxidcontinue(' ')
      False

  Added in version 3.15.

unicodedata.decomposition(chr, /)

  Returns the character decomposition mapping assigned to the character chr as string. An empty string is returned in case no such mapping is defined. For example:

      >>> unicodedata.decomposition('Ã')
      '0041 0303'

unicodedata.grapheme_cluster_break(chr, /)

  Returns the Grapheme_Cluster_Break property assigned to the character.

  Added in version 3.15.

unicodedata.indic_conjunct_break(chr, /)

  Returns the Indic_Conjunct_Break property assigned to the character.

  Added in version 3.15.

unicodedata.extended_pictographic(chr, /)

  Returns `True` if the character has the Extended_Pictographic property, `False` otherwise.

  Added in version 3.15.

unicodedata.normalize(form, unistr, /)

  Повертає звичайну форму form для рядка Unicode unistr. Дійсні значення для форми: «NFC», «NFKC», «NFD» і «NFKD».

  Стандарт Unicode визначає різні форми нормалізації рядка Unicode на основі визначення канонічної еквівалентності та еквівалентності сумісності. У Unicode декілька символів можуть бути виражені різними способами. Наприклад, символ U+00C7 (ВЕЛИКА ЛАТИНСЬКА ЛІТЕРА C ІЗ СЕДІЛЛОЮ) також можна виразити як послідовність U+0043 (ВЕЛИКА ЛАТИНСЬКА ЛІТЕРА C) U+0327 (ПОЄДНАННЯ СЕДІЛЛИ).

  Для кожного символу є дві нормальні форми: нормальна форма C і нормальна форма D. Нормальна форма D (NFD) також відома як канонічна декомпозиція та переводить кожен символ у його розкладену форму. Нормальна форма C (NFC) спочатку застосовує канонічну декомпозицію, а потім знову створює попередньо об’єднані символи.

  In addition to these two forms, there are two additional normal forms based on compatibility equivalence. In Unicode, certain characters are supported which normally would be unified with other characters. For example, U+2160 (ROMAN NUMERAL ONE) is really the same thing as U+0049 (LATIN CAPITAL LETTER I). However, it is supported in Unicode for compatibility with existing character sets (for example, gb2312).

  The normal form KD (NFKD) will apply the compatibility decomposition, that is, replace all compatibility characters with their equivalents. The normal form KC (NFKC) first applies the compatibility decomposition, followed by the canonical composition.

  Навіть якщо два рядки Unicode нормалізовані та виглядають однаково для людини, яка читає, якщо в одному є символи комбінування, а в іншому немає, вони можуть не порівнюватися.

unicodedata.is_normalized(form, unistr, /)

  Повертає, чи рядок Unicode unistr має звичайну форму form. Дійсні значення для форми: «NFC», «NFKC», «NFD» і «NFKD».

  Added in version 3.8.

unicodedata.iter_graphemes(unistr, start=0, end=sys.maxsize, /)

  Returns an iterator to iterate over grapheme clusters. With optional start, iteration begins at that position. With optional end, iteration stops at that position.

  Converting an emitted item to string returns a substring corresponding to the grapheme cluster. Its `start` and `end` attributes denote the start and end of the grapheme cluster.

  It uses extended grapheme cluster rules defined by Unicode Standard Annex #29, «Unicode Text Segmentation».

  Added in version 3.15.

In addition, the module exposes the following constants:

unicodedata.unidata_version

  Версія бази даних Unicode, що використовується в цьому модулі.

unicodedata.ucd_3_2_0

  This is an object that has most of the methods of the entire module, but uses the Unicode database version 3.2 instead, for applications that require this specific version of the Unicode database (such as IDNA).

Виноски

[1]

https://www.unicode.org/Public/17.0.0/ucd/NameAliases.txt

[2]

https://www.unicode.org/Public/17.0.0/ucd/NamedSequences.txt