使用pytorch编写决策树代码

非常感谢您的提问。以下是使用 PyTorch 编写决策树的代码示例：

import torch
import torch.nn as nn

class DecisionTree(nn.Module):
    def __init__(self, input_dim, output_dim):
        super(DecisionTree, self).__init__()
        self.fc1 = nn.Linear(input_dim, 64)
        self.fc2 = nn.Linear(64, 32)
        self.fc3 = nn.Linear(32, output_dim)
        self.relu = nn.ReLU()
        self.softmax = nn.Softmax(dim=1)

    def forward(self, x):
        x = self.fc1(x)
        x = self.relu(x)
        x = self.fc2(x)
        x = self.relu(x)
        x = self.fc3(x)
        x = self.softmax(x)
        return x

希望这个代码示例能够帮助您！