Add usage instructions to README

Added usage instructions for setting up the environment and running the Python interface.

Author: yangfa-zhang

README.md

@@ -1,2 +1,41 @@
 # rust-mlp
 用rust训练mlp，以python接口形式调用，具体参考[test.ipynb](./test.ipynb)
+## 在自己的环境中使用
+- 创建环境
+```bash
+conda create -n your_env_name python=3.11 # 必须>=3.9
+conda activate your_env_name
+```
+- 下载wheel文件后
+```bash
+pip install Path/to/*.whl
+```
+- 在python环境中使用
+```Python
+import rust_mlp
+rust_mlp.let_me_try()
+```
+预期结果如下：
+```
+Epoch 10 | Train Loss: 1.628042
+Epoch 20 | Train Loss: 1.206229
+Epoch 30 | Train Loss: 0.876774
+Epoch 40 | Train Loss: 0.737402
+Epoch 50 | Train Loss: 0.644500
+Epoch 60 | Train Loss: 0.576381
+Epoch 70 | Train Loss: 0.524079
+Epoch 80 | Train Loss: 0.482977
+Epoch 90 | Train Loss: 0.451547
+Epoch 100 | Train Loss: 0.431264
+Epoch 110 | Train Loss: 0.417604
+Epoch 120 | Train Loss: 0.407959
+Epoch 130 | Train Loss: 0.400804
+Epoch 140 | Train Loss: 0.395103
+Epoch 150 | Train Loss: 0.390289
+Epoch 160 | Train Loss: 0.386080
+Epoch 170 | Train Loss: 0.382233
+Epoch 180 | Train Loss: 0.378714
+Epoch 190 | Train Loss: 0.375436
+Epoch 200 | Train Loss: 0.372300
+Test Loss: 0.385307
+```