README.md

---
tags:
- model_hub_mixin
- pytorch_model_hub_mixin
language:
- en
metrics:
- accuracy
base_model:
- google-bert/bert-base-uncased
pipeline_tag: text-classification
---

This model has been pushed to the Hub using the [PytorchModelHubMixin](https://huggingface.co/docs/huggingface_hub/package_reference/mixins#huggingface_hub.PyTorchModelHubMixin) integration:
- Library: [More Information Needed]
- Docs: [More Information Needed]

The model class looks like the following:
```python
from transformers import BertModel

class BertClassifier(nn.Module, PyTorchModelHubMixin):
    def __init__(self, dataset: str, num_classes, dropout=0.5):

        super(BertClassifier, self).__init__()

        self.model_name = "bert-base-uncased"
        print(f"Loading BERT model {self.model_name} for {dataset} dataset...")

        self.bert = BertModel.from_pretrained(self.model_name)
        self.dropout = nn.Dropout(dropout)
        self.linear = nn.Linear(768, num_classes)  # in features, out features = number of classes
        self.relu = nn.ReLU()

    def forward(self, input_ids, attention_mask):

        _, pooled_output = self.bert(input_ids=input_ids, attention_mask=attention_mask, return_dict=False)
        dropout_output = self.dropout(pooled_output)
        linear_output = self.linear(dropout_output)
        final_layer = self.relu(linear_output)

        return final_layer
```

The H&M dataset has 89 classes. Loading in the model looks like this:
```python
model = BertClassifier.from_pretrained("CDL-RecSys/BERT-uncased-hm-category-classifier")
```

Before classifying the input sequence, the phrase needs to be processed with the `BertTokenizer`:
```python
from transformers import BertModel, BertTokenizer

tokenizer = BertTokenizer.from_pretrained("bert-base-uncased")
input = "Short, sleeveless dress in an airy cotton weave that is open at the back with a tie."

texts = self.tokenizer(batch, padding='max_length', max_length = 512, truncation=True,return_tensors="pt")
input_ids = texts["input_ids"]
attention_mask = texts["attention_mask"]

output = model(input_ids, attention_mask)
class = output.argmax(dim=1) # should be 13 (Dress)
```