1. Input source code:
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import torch.nn as nn
import torch.nn.functional as F
from torch.nn import init
import math

class ResNeXtBottleneck(nn.Module):
  expansion = 4
  """
  RexNeXt bottleneck type C (https://github.com/facebookresearch/ResNeXt/blob/master/models/resnext.lua)
  """
  def __init__(self, inplanes, planes, cardinality, base_width, stride=1, downsample=None):
    super(ResNeXtBottleneck, self).__init__()
    self.downsample = downsample

    D = int(math.floor(planes * (base_width/64.0)))
    C = cardinality
    self.conv_reduce = nn.Conv2d(inplanes, D*C, kernel_size=1, stride=1, padding=0, bias=False)
    self.bn_reduce = nn.BatchNorm2d(D*C)

    self.conv_conv = nn.Conv2d(D*C, D*C, kernel_size=3, stride=stride, padding=1, groups=cardinality, bias=False)
    self.bn = nn.BatchNorm2d(D*C)
    self.conv_expand = nn.Conv2d(D*C, planes*4, kernel_size=1, stride=1, padding=0, bias=False)
    self.bn_expand = nn.BatchNorm2d(planes*4)

  def forward(self, x):
    residual = x

    bottleneck = self.conv_reduce(x)
    bottleneck = F.relu(self.bn_reduce(bottleneck), inplace=True)

    bottleneck = self.conv_conv(bottleneck)
    bottleneck = F.relu(self.bn(bottleneck), inplace=True)

    bottleneck = self.conv_expand(bottleneck)
    bottleneck = self.bn_expand(bottleneck)

    if self.downsample is not None: residual = self.downsample(x)
    return F.relu(residual + bottleneck, inplace=True)


class CifarResNeXt(nn.Module):
  """
  ResNext optimized for the Cifar dataset, as specified in
  https://arxiv.org/pdf/1611.05431.pdf
  """
  def __init__(self, block, depth, cardinality, base_width, num_classes):
    super(CifarResNeXt, self).__init__()

    # Model type specifies number of layers for CIFAR-10 and CIFAR-100 model
    assert (depth - 2) % 9 == 0, 'depth should be one of 29, 38, 47, 56, 101'
    self.layer_blocks = (depth - 2) // 9

    self.cardinality,self.base_width,self.num_classes,self.block = cardinality,base_width,num_classes,block

    self.conv_1_3x3 = nn.Conv2d(3, 64, 3, 1, 1, bias=False)
    self.bn_1 = nn.BatchNorm2d(64)

    self.inplanes = 64
    self.stage_1 = self._make_layer(64 , 1)
    self.stage_2 = self._make_layer(128, 2)
    self.stage_3 = self._make_layer(256, 2)
    self.avgpool = nn.AdaptiveAvgPool2d((1,1))
    self.classifier = nn.Linear(256*block.expansion, num_classes)

    for m in self.modules():
      if isinstance(m, nn.Conv2d):
        n = m.kernel_size[0] * m.kernel_size[1] * m.out_channels
        m.weight.data.normal_(0, math.sqrt(2. / n))
      elif isinstance(m, nn.BatchNorm2d):
        m.weight.data.fill_(1)
        m.bias.data.zero_()
      elif isinstance(m, nn.Linear):
        init.kaiming_normal(m.weight)
        m.bias.data.zero_()

  def _make_layer(self, planes, stride=1):
    downsample = None
    exp_planes = planes * self.block.expansion
    if stride != 1 or self.inplanes != exp_planes:
      downsample = nn.Sequential(
        nn.Conv2d(self.inplanes, exp_planes, kernel_size=1, stride=stride, bias=False),
        nn.BatchNorm2d(exp_planes),
      )

    layers = []
    layers.append(self.block(self.inplanes, planes, self.cardinality, self.base_width, stride, downsample))
    self.inplanes = exp_planes
    for i in range(1, self.layer_blocks):
      layers.append(self.block(self.inplanes, planes, self.cardinality, self.base_width))

    return nn.Sequential(*layers)

  def forward(self, x):
    x = self.conv_1_3x3(x)
    x = F.relu(self.bn_1(x), inplace=True)
    x = self.stage_1(x)
    x = self.stage_2(x)
    x = self.stage_3(x)
    x = self.avgpool(x)
    x = x.view(x.size(0), -1)
    return F.log_softmax(self.classifier(x))

def resnext29_16_64(num_classes=10):
  """Constructs a ResNeXt-29, 16*64d model for CIFAR-10 (by default)
  
  Args:
    num_classes (uint): number of classes
  """
  model = CifarResNeXt(ResNeXtBottleneck, 29, 16, 64, num_classes)
  return model

def resnext29_8_64(num_classes=10):
  """Constructs a ResNeXt-29, 8*64d model for CIFAR-10 (by default)
  
  Args:
    num_classes (uint): number of classes
  """
  model = CifarResNeXt(ResNeXtBottleneck, 29, 8, 64, num_classes)
  return model

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2\) Use this JSON I uploaded
3\) Use the data.csv I uploaded