python-pytorchHow can I use PyTorch with Python 3.10?
PyTorch is a Python-based open source deep learning platform that provides maximum flexibility and speed. It is compatible with Python 3.10, and can be used to develop and train deep learning models.
To use PyTorch with Python 3.10, first install the PyTorch package with the command:
pip install torch
Then, import the PyTorch library into your Python code with the following command:
import torch
The following code block shows an example of how to use PyTorch with Python 3.10 to define and train a simple neural network:
import torch
# define the neural network
model = torch.nn.Sequential(
torch.nn.Linear(2, 3),
torch.nn.ReLU(),
torch.nn.Linear(3, 1)
)
# define the loss and optimizer
loss_fn = torch.nn.MSELoss(reduction='sum')
optimizer = torch.optim.SGD(model.parameters(), lr=1e-4)
# train the model
for t in range(500):
# forward pass
y_pred = model(x)
# compute and print loss
loss = loss_fn(y_pred, y)
print(t, loss.item())
# zero gradients, perform a backward pass, and update the weights
optimizer.zero_grad()
loss.backward()
optimizer.step()
Code explanation
import torch
: imports the PyTorch librarymodel = torch.nn.Sequential(...)
: defines the neural networkloss_fn = torch.nn.MSELoss(reduction='sum')
: defines the loss functionoptimizer = torch.optim.SGD(...)
: defines the optimizery_pred = model(x)
: performs a forward passloss = loss_fn(y_pred, y)
: computes the lossoptimizer.zero_grad()
: zeros the gradientsloss.backward()
: performs a backward passoptimizer.step()
: updates the weights
Helpful links
- PyTorch Documentation: https://pytorch.org/docs/stable/index.html
- PyTorch Tutorials: https://pytorch.org/tutorials/
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