class_docstr: NCE for MM joint space, with softmax on video2text matrix.
class_docstr_tok: ["NCE","for","MM","joint","space",",","with","softmax","on","video2text","matrix","."]
code: def __init__(self):
      # TODO (huxu): define temperature.
      self.loss = nn.CrossEntropyLoss()
  
imports: import torch
  from torch import nn
  from .loss import Loss
label_desc: Use image node_id 1 to create a new V2TContraLoss object from inherited base classes: Loss with example: obj = V2TContraLoss()