mirror of
https://github.com/guillaume-be/rust-bert.git
synced 2024-09-11 12:55:34 +03:00
377 lines
13 KiB
Rust
377 lines
13 KiB
Rust
extern crate dirs;
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extern crate failure;
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use rust_bert::bert::{
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BertConfig, BertConfigResources, BertForMaskedLM, BertForMultipleChoice,
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BertForQuestionAnswering, BertForSequenceClassification, BertForTokenClassification,
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BertModelResources, BertVocabResources,
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};
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use rust_bert::pipelines::ner::NERModel;
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use rust_bert::resources::{download_resource, RemoteResource, Resource};
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use rust_bert::Config;
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use rust_tokenizers::{BertTokenizer, Tokenizer, TruncationStrategy, Vocab};
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use std::collections::HashMap;
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use tch::{nn, no_grad, Device, Tensor};
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#[test]
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fn bert_masked_lm() -> failure::Fallible<()> {
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// Resources paths
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let config_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertConfigResources::BERT));
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let vocab_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertVocabResources::BERT));
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let weights_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertModelResources::BERT));
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let config_path = download_resource(&config_resource)?;
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let vocab_path = download_resource(&vocab_resource)?;
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let weights_path = download_resource(&weights_resource)?;
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// Set-up masked LM model
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let device = Device::Cpu;
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let mut vs = nn::VarStore::new(device);
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let tokenizer: BertTokenizer = BertTokenizer::from_file(vocab_path.to_str().unwrap(), true);
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let config = BertConfig::from_file(config_path);
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let bert_model = BertForMaskedLM::new(&vs.root(), &config);
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vs.load(weights_path)?;
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// Define input
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let input = [
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"Looks like one thing is missing",
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"It\'s like comparing oranges to apples",
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];
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let tokenized_input =
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tokenizer.encode_list(input.to_vec(), 128, &TruncationStrategy::LongestFirst, 0);
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let max_len = tokenized_input
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.iter()
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.map(|input| input.token_ids.len())
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.max()
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.unwrap();
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let mut tokenized_input = tokenized_input
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.iter()
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.map(|input| input.token_ids.clone())
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.map(|mut input| {
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input.extend(vec![0; max_len - input.len()]);
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input
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})
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.collect::<Vec<_>>();
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// Masking the token [thing] of sentence 1 and [oranges] of sentence 2
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tokenized_input[0][4] = 103;
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tokenized_input[1][6] = 103;
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let tokenized_input = tokenized_input
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.iter()
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.map(|input| Tensor::of_slice(&(input)))
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.collect::<Vec<_>>();
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let input_tensor = Tensor::stack(tokenized_input.as_slice(), 0).to(device);
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// Forward pass
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let (output, _, _) = no_grad(|| {
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bert_model.forward_t(
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Some(input_tensor),
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None,
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None,
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None,
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None,
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&None,
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&None,
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false,
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)
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});
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// Print masked tokens
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let index_1 = output.get(0).get(4).argmax(0, false);
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let index_2 = output.get(1).get(6).argmax(0, false);
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let word_1 = tokenizer.vocab().id_to_token(&index_1.int64_value(&[]));
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let word_2 = tokenizer.vocab().id_to_token(&index_2.int64_value(&[]));
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assert_eq!("person", word_1); // Outputs "person" : "Looks like one [person] is missing"
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assert_eq!("orange", word_2); // Outputs "pear" : "It\'s like comparing [pear] to apples"
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Ok(())
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}
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#[test]
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fn bert_for_sequence_classification() -> failure::Fallible<()> {
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// Resources paths
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let config_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertConfigResources::BERT));
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let vocab_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertVocabResources::BERT));
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let config_path = download_resource(&config_resource)?;
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let vocab_path = download_resource(&vocab_resource)?;
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// Set-up model
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let device = Device::Cpu;
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let vs = nn::VarStore::new(device);
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let tokenizer: BertTokenizer = BertTokenizer::from_file(vocab_path.to_str().unwrap(), true);
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let mut config = BertConfig::from_file(config_path);
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let mut dummy_label_mapping = HashMap::new();
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dummy_label_mapping.insert(0, String::from("Positive"));
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dummy_label_mapping.insert(1, String::from("Negative"));
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dummy_label_mapping.insert(3, String::from("Neutral"));
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config.id2label = Some(dummy_label_mapping);
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config.output_attentions = Some(true);
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config.output_hidden_states = Some(true);
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let bert_model = BertForSequenceClassification::new(&vs.root(), &config);
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// Define input
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let input = [
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"Looks like one thing is missing",
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"It\'s like comparing oranges to apples",
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];
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let tokenized_input =
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tokenizer.encode_list(input.to_vec(), 128, &TruncationStrategy::LongestFirst, 0);
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let max_len = tokenized_input
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.iter()
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.map(|input| input.token_ids.len())
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.max()
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.unwrap();
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let tokenized_input = tokenized_input
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.iter()
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.map(|input| input.token_ids.clone())
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.map(|mut input| {
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input.extend(vec![0; max_len - input.len()]);
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input
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})
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.map(|input| Tensor::of_slice(&(input)))
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.collect::<Vec<_>>();
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let input_tensor = Tensor::stack(tokenized_input.as_slice(), 0).to(device);
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// Forward pass
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let (output, all_hidden_states, all_attentions) =
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no_grad(|| bert_model.forward_t(Some(input_tensor), None, None, None, None, false));
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assert_eq!(output.size(), &[2, 3]);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_hidden_states.unwrap().len()
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);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_attentions.unwrap().len()
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);
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Ok(())
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}
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#[test]
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fn bert_for_multiple_choice() -> failure::Fallible<()> {
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// Resources paths
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let config_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertConfigResources::BERT));
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let vocab_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertVocabResources::BERT));
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let config_path = download_resource(&config_resource)?;
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let vocab_path = download_resource(&vocab_resource)?;
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// Set-up model
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let device = Device::Cpu;
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let vs = nn::VarStore::new(device);
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let tokenizer: BertTokenizer = BertTokenizer::from_file(vocab_path.to_str().unwrap(), true);
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let mut config = BertConfig::from_file(config_path);
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config.output_attentions = Some(true);
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config.output_hidden_states = Some(true);
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let bert_model = BertForMultipleChoice::new(&vs.root(), &config);
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// Define input
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let input = [
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"Looks like one thing is missing",
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"It\'s like comparing oranges to apples",
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];
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let tokenized_input =
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tokenizer.encode_list(input.to_vec(), 128, &TruncationStrategy::LongestFirst, 0);
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let max_len = tokenized_input
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.iter()
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.map(|input| input.token_ids.len())
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.max()
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.unwrap();
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let tokenized_input = tokenized_input
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.iter()
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.map(|input| input.token_ids.clone())
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.map(|mut input| {
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input.extend(vec![0; max_len - input.len()]);
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input
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})
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.map(|input| Tensor::of_slice(&(input)))
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.collect::<Vec<_>>();
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let input_tensor = Tensor::stack(tokenized_input.as_slice(), 0)
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.to(device)
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.unsqueeze(0);
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// Forward pass
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let (output, all_hidden_states, all_attentions) =
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no_grad(|| bert_model.forward_t(input_tensor, None, None, None, false));
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assert_eq!(output.size(), &[1, 2]);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_hidden_states.unwrap().len()
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);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_attentions.unwrap().len()
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);
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Ok(())
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}
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#[test]
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fn bert_for_token_classification() -> failure::Fallible<()> {
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// Resources paths
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let config_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertConfigResources::BERT));
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let vocab_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertVocabResources::BERT));
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let config_path = download_resource(&config_resource)?;
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let vocab_path = download_resource(&vocab_resource)?;
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// Set-up model
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let device = Device::Cpu;
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let vs = nn::VarStore::new(device);
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let tokenizer: BertTokenizer = BertTokenizer::from_file(vocab_path.to_str().unwrap(), true);
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let mut config = BertConfig::from_file(config_path);
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let mut dummy_label_mapping = HashMap::new();
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dummy_label_mapping.insert(0, String::from("O"));
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dummy_label_mapping.insert(1, String::from("LOC"));
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dummy_label_mapping.insert(2, String::from("PER"));
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dummy_label_mapping.insert(3, String::from("ORG"));
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config.id2label = Some(dummy_label_mapping);
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config.output_attentions = Some(true);
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config.output_hidden_states = Some(true);
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let bert_model = BertForTokenClassification::new(&vs.root(), &config);
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// Define input
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let input = [
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"Looks like one thing is missing",
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"It\'s like comparing oranges to apples",
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];
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let tokenized_input =
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tokenizer.encode_list(input.to_vec(), 128, &TruncationStrategy::LongestFirst, 0);
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let max_len = tokenized_input
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.iter()
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.map(|input| input.token_ids.len())
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.max()
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.unwrap();
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let tokenized_input = tokenized_input
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.iter()
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.map(|input| input.token_ids.clone())
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.map(|mut input| {
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input.extend(vec![0; max_len - input.len()]);
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input
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})
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.map(|input| Tensor::of_slice(&(input)))
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.collect::<Vec<_>>();
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let input_tensor = Tensor::stack(tokenized_input.as_slice(), 0).to(device);
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// Forward pass
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let (output, all_hidden_states, all_attentions) =
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no_grad(|| bert_model.forward_t(Some(input_tensor), None, None, None, None, false));
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assert_eq!(output.size(), &[2, 11, 4]);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_hidden_states.unwrap().len()
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);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_attentions.unwrap().len()
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);
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Ok(())
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}
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#[test]
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fn bert_for_question_answering() -> failure::Fallible<()> {
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// Resources paths
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let config_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertConfigResources::BERT));
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let vocab_resource =
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Resource::Remote(RemoteResource::from_pretrained(BertVocabResources::BERT));
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let config_path = download_resource(&config_resource)?;
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let vocab_path = download_resource(&vocab_resource)?;
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// Set-up model
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let device = Device::Cpu;
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let vs = nn::VarStore::new(device);
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let tokenizer: BertTokenizer = BertTokenizer::from_file(vocab_path.to_str().unwrap(), true);
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let mut config = BertConfig::from_file(config_path);
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config.output_attentions = Some(true);
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config.output_hidden_states = Some(true);
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let bert_model = BertForQuestionAnswering::new(&vs.root(), &config);
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// Define input
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let input = [
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"Looks like one thing is missing",
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"It\'s like comparing oranges to apples",
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];
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let tokenized_input =
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tokenizer.encode_list(input.to_vec(), 128, &TruncationStrategy::LongestFirst, 0);
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let max_len = tokenized_input
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.iter()
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.map(|input| input.token_ids.len())
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.max()
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.unwrap();
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let tokenized_input = tokenized_input
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.iter()
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.map(|input| input.token_ids.clone())
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.map(|mut input| {
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input.extend(vec![0; max_len - input.len()]);
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input
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})
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.map(|input| Tensor::of_slice(&(input)))
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.collect::<Vec<_>>();
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let input_tensor = Tensor::stack(tokenized_input.as_slice(), 0).to(device);
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// Forward pass
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let (start_scores, end_scores, all_hidden_states, all_attentions) =
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no_grad(|| bert_model.forward_t(Some(input_tensor), None, None, None, None, false));
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assert_eq!(start_scores.size(), &[2, 11]);
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assert_eq!(end_scores.size(), &[2, 11]);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_hidden_states.unwrap().len()
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);
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assert_eq!(
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config.num_hidden_layers as usize,
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all_attentions.unwrap().len()
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);
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Ok(())
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}
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#[test]
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fn bert_pre_trained_ner() -> failure::Fallible<()> {
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// Set-up model
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let ner_model = NERModel::new(Default::default())?;
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// Define input
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let input = [
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"My name is Amy. I live in Paris.",
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"Paris is a city in France.",
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];
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// Run model
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let output = ner_model.predict(&input);
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assert_eq!(output.len(), 4);
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assert_eq!(output[0].word, "Amy");
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assert!((output[0].score - 0.9986).abs() < 1e-4);
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assert_eq!(output[0].label, "I-PER");
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assert_eq!(output[1].word, "Paris");
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assert!((output[1].score - 0.9986).abs() < 1e-4);
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assert_eq!(output[1].label, "I-LOC");
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assert_eq!(output[2].word, "Paris");
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assert!((output[2].score - 0.9988).abs() < 1e-4);
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assert_eq!(output[2].label, "I-LOC");
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assert_eq!(output[3].word, "France");
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assert!((output[3].score - 0.9994).abs() < 1e-4);
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assert_eq!(output[3].label, "I-LOC");
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Ok(())
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}
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