TypeError: forward() takes 1 positional argument but 2 were given

This error occurs when you pass too many arguments to the forward() method of a PyTorch model. The forward() method is the main computation function of the model, and it takes the input tensor as its argument.

To fix this error, make sure that you are passing only one argument to the forward() method. Check the code where you are calling the model's forward() method and verify that you are passing only the input tensor.

For example, if you have a model called MyModel, and you are calling its forward() method like this:

model = MyModel()
input_tensor = torch.randn(1, 3, 224, 224)
output_tensor = model.forward(input_tensor, some_other_argument)

You should remove the extra argument and call the forward() method like this:

model = MyModel()
input_tensor = torch.randn(1, 3, 224, 224)
output_tensor = model.forward(input_tensor)