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106 lines
3.9 KiB
Plaintext
106 lines
3.9 KiB
Plaintext
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//- Docs > API > StringStore
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//- ============================================================================
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+section('stringstore')
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+h2('stringstore', 'https://github.com/' + profiles.github + '/spaCy/blob/master/spacy/strings.pyx#L74')
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| #[+label('tag') class] StringStore
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p
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| Intern strings, and map them to sequential integer IDs.
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p
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| Only the integer IDs are held by spaCy's data
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| classes (#[code Doc], #[code Token], #[code Span] and #[code Lexeme])
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| – when you use a string-valued attribute like #[code token.orth_],
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| you access a property that computes #[code token.strings[token.orth]].
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+aside('Efficiency').
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The mapping table is very efficient , and a small-string optimization
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is used to maintain a small memory footprint.
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+table(['Usage', 'Description'], 'code')
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+row
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+cell #[code.lang-python string = string_store[int_id]]
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+cell.
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Retrieve a string from a given integer ID. If the integer ID
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is not found, raise #[code IndexError].
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+row
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+cell #[code.lang-python int_id = string_store[unicode_string]]
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+cell.
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Map a unicode string to an integer ID. If the string is
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previously unseen, it is interned, and a new ID is returned.
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+row
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+cell #[code.lang-python int_id = string_store[utf8_byte_string]]
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+cell.
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Byte strings are assumed to be in UTF-8 encoding. Strings
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encoded with other codecs may fail silently. Given a utf8
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string, the behaviour is the same as for unicode strings.
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Internally, strings are stored in UTF-8 format. So if you start
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with a UTF-8 byte string, it's less efficient to first decode
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it as unicode, as StringStore will then have to encode it as
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UTF-8 once again.
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+row
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+cell #[code.lang-python n_strings = len(string_store)]
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+cell.
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Number of strings in the string-store.
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+row
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+cell #[code.lang-python for string in string_store]
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+cell
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p.
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Iterate over strings in the string store, in order, such
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that the ith string in the sequence has the ID #[code i]:
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+code.code-block-small.no-block.
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string_store = doc.vocab.strings
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for i, string in enumerate(string_store):
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assert i == string_store[string]
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+section('stringstore-init')
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+h3('stringstore-init')
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| #[+label('tag') method] StringStore.__init__
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+code('python', 'Definition').
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def __init__(self):
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return self
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+section('stringstore-dump')
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+h3('stringstore-dump')
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| #[+label('tag') method] StringStore.dump
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p Save the string-to-int mapping to the given file.
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+code('python', 'Definition').
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def dump(self, file):
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return None
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+table(['Name', 'Type', 'Description'], 'params')
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+row
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+cell loc
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+cell str
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+cell.
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The file to write the data to.
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+section('stringstore-load')
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+h3('stringstore-load')
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| #[+label('tag') method] StringStore.load
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p Load the strings from the given file.
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+code('python', 'Definition').
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def load(self, file):
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return None
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+table(['Name', 'Type', 'Description'], 'params')
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+row
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+cell file
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+cell file
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+cell.
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File-like object to load the data from. The format is subject
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to change; so if you need to read/write compatible files, please
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find details in the strings.pyx source.
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