[Fix] Add the command in the README for the single-GPU case (#48)

* Implement portable eval script for server

* lint format

* implement visualizer for debugging

* Update README

* docstring

* Refine some docstrings.

* refine docstring

* refine docstring

* update README for single gpu training/testing

README.md

@@ -180,6 +180,10 @@ We provide configs for different tasks [here](configs/) and you can run the trai
 For example, to train a multi-view 3D detection model with pytorch, just run:
 
 ```bash
+# Single GPU training
+python tools/train.py configs/detection/mv-det3d_8xb4_embodiedscan-3d-284class-9dof.py --work-dir=work_dirs/mv-3ddet
+
+# Multiple GPU training
 python tools/train.py configs/detection/mv-det3d_8xb4_embodiedscan-3d-284class-9dof.py --work-dir=work_dirs/mv-3ddet --launcher="pytorch"
 ```
 
@@ -190,6 +194,10 @@ NOTE: To run the multi-view 3D grounding experiments, please first download the
 To inference and evaluate the model (e.g., the checkpoint `work_dirs/mv-3ddet/epoch_12.pth`), just run the test script:
 
 ```bash
+# Single GPU testing
+python tools/test.py configs/detection/mv-det3d_8xb4_embodiedscan-3d-284class-9dof.py work_dirs/mv-3ddet/epoch_12.pth
+
+# Multiple GPU testing
 python tools/test.py configs/detection/mv-det3d_8xb4_embodiedscan-3d-284class-9dof.py work_dirs/mv-3ddet/epoch_12.pth --launcher="pytorch"
 ```