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import torch |
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from data.field.mini_torchtext.field import RawField |
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from data.field.mini_torchtext.vocab import Vocab |
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from collections import Counter |
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import types |
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class EdgeField(RawField): |
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def __init__(self): |
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super(EdgeField, self).__init__() |
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self.vocab = None |
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def process(self, edges, device=None): |
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edges = self.numericalize(edges) |
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tensor = self.pad(edges, device) |
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return tensor |
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def pad(self, edges, device): |
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tensor = torch.zeros(edges[0], edges[1], dtype=torch.long, device=device) |
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for edge in edges[-1]: |
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tensor[edge[0], edge[1]] = edge[2] |
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return tensor |
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def numericalize(self, arr): |
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def multi_map(array, function): |
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if isinstance(array, tuple): |
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return (array[0], array[1], function(array[2])) |
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elif isinstance(array, list): |
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return [multi_map(array[i], function) for i in range(len(array))] |
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else: |
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return array |
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if self.vocab is not None: |
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arr = multi_map(arr, lambda x: self.vocab.stoi[x] if x is not None else 0) |
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return arr |
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def build_vocab(self, *args): |
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def generate(l): |
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if isinstance(l, tuple): |
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yield l[2] |
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elif isinstance(l, list) or isinstance(l, types.GeneratorType): |
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for i in l: |
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yield from generate(i) |
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else: |
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return |
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counter = Counter() |
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sources = [] |
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for arg in args: |
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if isinstance(arg, torch.utils.data.Dataset): |
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sources += [arg.get_examples(name) for name, field in arg.fields.items() if field is self] |
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else: |
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sources.append(arg) |
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for x in generate(sources): |
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if x is not None: |
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counter.update([x]) |
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self.vocab = Vocab(counter, specials=[]) |
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