mirror of https://github.com/explosion/spaCy.git
94 lines
2.9 KiB
Cython
94 lines
2.9 KiB
Cython
from __future__ import unicode_literals
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from collections import defaultdict
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cdef class Span:
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"""A slice from a Tokens object."""
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def __cinit__(self, Tokens tokens, int start, int end, int label=0):
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self._seq = tokens
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self.start = start
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self.end = end
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self.label = label
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def __richcmp__(self, Span other, int op):
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# Eq
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if op == 0:
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return self.start < other.start
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elif op == 1:
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return self.start <= other.start
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elif op == 2:
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return self.start == other.start and self.end == other.end
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elif op == 3:
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return self.start != other.start or self.end != other.end
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elif op == 4:
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return self.start > other.start
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elif op == 5:
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return self.start >= other.start
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def __len__(self):
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if self.end < self.start:
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return 0
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return self.end - self.start
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def __getitem__(self, int i):
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return self._seq[self.start + i]
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def __iter__(self):
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for i in range(self.start, self.end):
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yield self._seq[i]
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property head:
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"""The highest Token in the dependency tree in the Span, or None if
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the Span is not internally connected (i.e. there are multiple heads).
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"""
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def __get__(self):
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heads = []
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for token in self:
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head_i = token.head.i
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if token.head is token or head_i >= self.end or head_i < self.start:
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heads.append(token)
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if len(heads) != 1:
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return None
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else:
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return heads[0]
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property lefts:
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"""Tokens that are to the left of the Span, whose head is within the Span."""
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def __get__(self):
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for token in reversed(self): # Reverse, so we get the tokens in order
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for left in token.lefts:
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if left.i < self.start:
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yield left
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property right:
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"""Tokens that are to the right of the Span, whose head is within the Span."""
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def __get__(self):
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for token in self:
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for right in token.rights:
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if right.i >= self.end:
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yield right
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property orth_:
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def __get__(self):
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return ''.join([t.string for t in self]).strip()
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property lemma_:
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def __get__(self):
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return ' '.join([t.lemma_ for t in self]).strip()
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property string:
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def __get__(self):
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return ''.join([t.string for t in self])
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property label_:
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def __get__(self):
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return self._seq.vocab.strings[self.label]
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property subtree:
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def __get__(self):
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for word in self.lefts:
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yield from word.subtree
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yield self
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for word in self.rights:
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yield from word.subtree
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