wizardoftrap/language_agnostic_classifier

Language-Agnostic Text Classifier

Trained only on English data
Works on both English and Hindi at inference time without retraining (Other langauges not tested)

Task: Sentence-level sentiment classification
Base model: bert-base-multilingual-cased
For more details: Github Repo

Usage

import torch
import torch.nn as nn
from transformers import AutoTokenizer, AutoModel

class LanguageAgnosticClassifier(nn.Module):
    def __init__(self, base_model, num_labels):
        super().__init__()
        self.encoder = AutoModel.from_pretrained(base_model)
        hidden = self.encoder.config.hidden_size
        self.classifier = nn.Linear(hidden, num_labels)

    def mean_pool(self, hidden, mask):
        mask = mask.unsqueeze(-1).float()
        return (hidden * mask).sum(1) / mask.sum(1)

    def forward(self, input_ids, attention_mask):
        out = self.encoder(input_ids=input_ids, attention_mask=attention_mask)
        pooled = self.mean_pool(out.last_hidden_state, attention_mask)
        return self.classifier(pooled)

tokenizer = AutoTokenizer.from_pretrained(
    "wizardoftrap/language_agnostic_classifier"
)

model = LanguageAgnosticClassifier(
    base_model="bert-base-multilingual-cased",
    num_labels=2
)

state_dict = torch.hub.load_state_dict_from_url(
    "https://huggingface.co/wizardoftrap/language_agnostic_classifier/resolve/main/bert-language_agnostic-classifier.bin",
    map_location="cpu"
)

model.load_state_dict(state_dict)
model.eval()

def predict(text):
    enc = tokenizer(
        text,
        return_tensors="pt",
        truncation=True,
        padding="max_length",
        max_length=128
    )
    with torch.no_grad():
        logits = model(enc["input_ids"], enc["attention_mask"])
    return logits.argmax(1).item()

predict("This movie was amazing")
predict("This movie was terrible")
predict("The film was not bad, but not great either")
predict("Despite good acting, the story failed to impress me")

predict("यह फिल्म बहुत शानदार थी")
predict("यह फिल्म बहुत खराब थी")
predict("फिल्म बुरी नहीं थी, लेकिन खास भी नहीं लगी")
predict("अभिनय अच्छा था, पर कहानी कमजोर रह गई")

predict("Story अच्छी थी but execution weak था")
predict("Acting was good लेकिन movie boring लगी")
predict("Concept अच्छा था but screenplay खराब था")

predict("Yeah, this movie was a masterpiece… said no one ever")
predict("फिल्म इतनी अच्छी थी कि नींद आ गई")

predict("The movie was okay")
predict("फिल्म ठीक-ठाक थी")

- Shiv Prakash Verma