modeling_custom.py

"""
Custom model with relative import to demonstrate the bug.
"""
from transformers import PreTrainedModel
from transformers.modeling_outputs import BaseModelOutput
import torch
import torch.nn as nn

# This relative import should cause the bug when the folder has a dot in the name
from .another_module import custom_function


class CustomModel(PreTrainedModel):
    def __init__(self, config):
        super().__init__(config)
        self.embeddings = nn.Embedding(config.vocab_size, config.hidden_size)
        self.layer = nn.Linear(config.hidden_size, config.hidden_size)
        
    def forward(self, input_ids=None, **kwargs):
        embeddings = self.embeddings(input_ids)
        # Use the function from the relative import
        output = custom_function(embeddings)
        hidden_states = self.layer(output)
        
        return BaseModelOutput(last_hidden_state=hidden_states)