I have this simple tensorflow code block, what is the equivalent in pytorch? I am stuck trying to code it. I have encountered multiple Runtime errors, due to the dimensions.

This is the tensorflow code:

```
conv1 = tf.nn.conv1d(x,f1,stride=1,padding="VALID")
conv1 = tf.nn.bias_add(conv1, b1)
conv1 = tf.nn.sigmoid(conv1)
p1 = tf.layers.average_pooling1d(conv1, pool_size=2, strides=2, padding='VALID')
conv2 = tf.nn.conv1d(p1,f2,stride=1,padding="VALID")
conv2 = tf.nn.bias_add(conv2, b2)
conv2 = tf.nn.sigmoid(conv2)
p2 = tf.layers.average_pooling1d(conv2, pool_size=2, strides=2, padding='VALID')
nn = tf.layers.Flatten()(p2)
fc1 = tf.add(tf.matmul(nn, n1), b3)
fc1 = tf.nn.sigmoid(fc1)
out = tf.add(tf.matmul(fc1, n2), b4)
out = tf.nn.softmax(out)
```

How can I implement the same in pytorch? The code below is what I tried, but the dimensions are messed up, I think due to the channel inputs.

```
class TwoLayerNet(torch.nn.Module):
def __init__(self):
super(TwoLayerNet,self).__init__()
self.conv1 = nn.Sequential(
nn.Conv2d(1,3, 3*8, kernel_size=5, stride=1),
nn.Sigmoid(),
nn.AvgPool1d(kernel_size=2, stride=0))
self.conv2 = nn.Sequential(
nn.Conv1d(3*8, 12, kernel_size=5, stride=1),
nn.Sigmoid(),
nn.AvgPool1d(kernel_size=2, stride = 0))
#self.drop_out = nn.Dropout()
self.fc1 = nn.Linear(708, 732)
self.fc2 = nn.Linear(732, 4)
def forward(self, x):
out = self.conv1(x)
out = self.conv2(out)
out = out.reshape(out.size(0), -1)
out = self.drop_out(out)
out = self.fc1(out)
out = self.fc2(out)
return out
```