code: def forward(self, x):
      x = x.view(-1, 1)
  
      return torch.argmax(torch.eq(x, self.check_tensor).int(), dim=1)
  
file_path: hummingbird/hummingbird/ml/operator_converters/_label_encoder_implementations.py
imports: import torch
  import numpy
  from ._physical_operator import PhysicalOperator
  from .None import constants
label_desc: Use image node_id 2 for calling the NumericLabelEncoder obj's underlying member method code with example usage: obj.forward(x) and returns: torch