What is PyTorch and how do I get started with it?

What is PyTorch and how do I get started with it?

PyTorch is an open-source machine learning library used for applications such as computer vision and natural language processing. To get started, you can install it via pip and check out the official tutorials.

Can you show me a simple example of using PyTorch?

Sure! Here's a simple example of creating a tensor in PyTorch:

import torch

# Create a 2D tensor
x = torch.tensor([[1, 2], [3, 4]])
print(x)

What are tensors in PyTorch?

Tensors are the fundamental data structures in PyTorch, similar to NumPy arrays, but they can also be used on GPUs for faster computation.

How do I train a model using PyTorch?

To train a model in PyTorch, you typically define a model class, specify a loss function, and use an optimizer to update the model weights based on the loss.