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Model: cardiffnlp/twitter-roberta-base-sentiment-latest
Source: Original Platform

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README.md

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+---
+language: en
+widget:
+- text: Covid cases are increasing fast!
+datasets:
+- tweet_eval
+license: cc-by-4.0
+---
+
+
+# Twitter-roBERTa-base for Sentiment Analysis - UPDATED (2022)
+
+This is a RoBERTa-base model trained on ~124M tweets from January 2018 to December 2021, and finetuned for sentiment analysis with the TweetEval benchmark. 
+The original Twitter-based RoBERTa model can be found [here](https://huggingface.co/cardiffnlp/twitter-roberta-base-2021-124m) and the original reference paper is [TweetEval](https://github.com/cardiffnlp/tweeteval). This model is suitable for English. 
+
+- Reference Paper: [TimeLMs paper](https://arxiv.org/abs/2202.03829). 
+- Git Repo: [TimeLMs official repository](https://github.com/cardiffnlp/timelms).
+
+<b>Labels</b>: 
+0 -> Negative;
+1 -> Neutral;
+2 -> Positive
+
+This sentiment analysis model has been integrated into [TweetNLP](https://github.com/cardiffnlp/tweetnlp). You can access the demo [here](https://tweetnlp.org).
+
+## Example Pipeline
+```python
+from transformers import pipeline
+sentiment_task = pipeline("sentiment-analysis", model=model_path, tokenizer=model_path)
+sentiment_task("Covid cases are increasing fast!")
+```
+```
+[{'label': 'Negative', 'score': 0.7236}]
+```
+
+## Full classification example
+
+```python
+from transformers import AutoModelForSequenceClassification
+from transformers import TFAutoModelForSequenceClassification
+from transformers import AutoTokenizer, AutoConfig
+import numpy as np
+from scipy.special import softmax
+# Preprocess text (username and link placeholders)
+def preprocess(text):
+    new_text = []
+    for t in text.split(" "):
+        t = '@user' if t.startswith('@') and len(t) > 1 else t
+        t = 'http' if t.startswith('http') else t
+        new_text.append(t)
+    return " ".join(new_text)
+MODEL = f"cardiffnlp/twitter-roberta-base-sentiment-latest"
+tokenizer = AutoTokenizer.from_pretrained(MODEL)
+config = AutoConfig.from_pretrained(MODEL)
+# PT
+model = AutoModelForSequenceClassification.from_pretrained(MODEL)
+#model.save_pretrained(MODEL)
+text = "Covid cases are increasing fast!"
+text = preprocess(text)
+encoded_input = tokenizer(text, return_tensors='pt')
+output = model(**encoded_input)
+scores = output[0][0].detach().numpy()
+scores = softmax(scores)
+# # TF
+# model = TFAutoModelForSequenceClassification.from_pretrained(MODEL)
+# model.save_pretrained(MODEL)
+# text = "Covid cases are increasing fast!"
+# encoded_input = tokenizer(text, return_tensors='tf')
+# output = model(encoded_input)
+# scores = output[0][0].numpy()
+# scores = softmax(scores)
+# Print labels and scores
+ranking = np.argsort(scores)
+ranking = ranking[::-1]
+for i in range(scores.shape[0]):
+    l = config.id2label[ranking[i]]
+    s = scores[ranking[i]]
+    print(f"{i+1}) {l} {np.round(float(s), 4)}")
+```
+
+Output: 
+
+```
+1) Negative 0.7236
+2) Neutral 0.2287
+3) Positive 0.0477
+```
+
+
+### References 
+```
+@inproceedings{camacho-collados-etal-2022-tweetnlp,
+    title = "{T}weet{NLP}: Cutting-Edge Natural Language Processing for Social Media",
+    author = "Camacho-collados, Jose  and
+      Rezaee, Kiamehr  and
+      Riahi, Talayeh  and
+      Ushio, Asahi  and
+      Loureiro, Daniel  and
+      Antypas, Dimosthenis  and
+      Boisson, Joanne  and
+      Espinosa Anke, Luis  and
+      Liu, Fangyu  and
+      Mart{\'\i}nez C{\'a}mara, Eugenio" and others,
+    booktitle = "Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing: System Demonstrations",
+    month = dec,
+    year = "2022",
+    address = "Abu Dhabi, UAE",
+    publisher = "Association for Computational Linguistics",
+    url = "https://aclanthology.org/2022.emnlp-demos.5",
+    pages = "38--49"
+}
+
+```
+
+```
+@inproceedings{loureiro-etal-2022-timelms,
+    title = "{T}ime{LM}s: Diachronic Language Models from {T}witter",
+    author = "Loureiro, Daniel  and
+      Barbieri, Francesco  and
+      Neves, Leonardo  and
+      Espinosa Anke, Luis  and
+      Camacho-collados, Jose",
+    booktitle = "Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics: System Demonstrations",
+    month = may,
+    year = "2022",
+    address = "Dublin, Ireland",
+    publisher = "Association for Computational Linguistics",
+    url = "https://aclanthology.org/2022.acl-demo.25",
+    doi = "10.18653/v1/2022.acl-demo.25",
+    pages = "251--260"
+}
+
+```

config.json

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+{
+  "_name_or_path": "/home/jupyter/misc/tweeteval/TweetEval_models/sentiment/sentiment_latest_2021/",
+  "architectures": [
+    "RobertaForSequenceClassification"
+  ],
+  "attention_probs_dropout_prob": 0.1,
+  "bos_token_id": 0,
+  "classifier_dropout": null,
+  "eos_token_id": 2,
+  "gradient_checkpointing": false,
+  "hidden_act": "gelu",
+  "hidden_dropout_prob": 0.1,
+  "hidden_size": 768,
+  "id2label": {
+    "0": "negative",
+    "1": "neutral",
+    "2": "positive"
+  },
+  "initializer_range": 0.02,
+  "intermediate_size": 3072,
+  "label2id": {
+    "negative": 0,
+    "neutral": 1,
+    "positive": 2
+  },
+  "layer_norm_eps": 1e-05,
+  "max_position_embeddings": 514,
+  "model_type": "roberta",
+  "num_attention_heads": 12,
+  "num_hidden_layers": 12,
+  "pad_token_id": 1,
+  "position_embedding_type": "absolute",
+  "torch_dtype": "float32",
+  "transformers_version": "4.13.0.dev0",
+  "type_vocab_size": 1,
+  "vocab_size": 50265
+}

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