update readme (#61)

README.md

@@ -63,10 +63,17 @@ Pressing W, A, S, D to move and turn and T to trigger the auto-drive mode!
 python -m metadrive.examples.drive_in_single_agent_env
 ```
 
+Besides, a scenario where safety must be concerned is included in examples, and this environment also shows how 
+to compose a sophisticate scenario.
+
+```bash
+python -m metadrive.examples.drive_in_safe_metadrive_env
+```
+
 You can also drive in our Multi-agent RL environment. 
 
 ```bash
-python -m metadrive.examples.drive_in_multiagent_env --env [env_name]
+python -m metadrive.examples.drive_in_multi_agent_env --env roundabout
 ```
 Accepted arguments:
 - roundabout (default)

metadrive/constants.py

@@ -5,7 +5,7 @@
 from panda3d.core import Vec3
 from panda3d.core import Vec4, BitMask32
 
-EDITION = "MetaDrive v0.2.0"
+EDITION = "MetaDrive v0.2.2"
 DEFAULT_AGENT = "default_agent"
 RENDER_MODE_NONE = "none"  # Do not render
 RENDER_MODE_ONSCREEN = "onscreen"  # Pop up a window and draw image in it

metadrive/engine/core/manual_controller.py

@@ -1,3 +1,5 @@
+import logging
+
 from direct.controls.InputState import InputState
 
 from metadrive.utils import is_win, is_mac
@@ -7,7 +9,7 @@
         import evdev
         from evdev import ecodes, InputDevice
     except ImportError:
-        print("Install evdev to enable steering wheel control")
+        pass
 
 from metadrive.utils import import_pygame
 
@@ -67,6 +69,14 @@ class SteeringWheelController(Controller):
     STEERING_MAKEUP = 1.5
 
     def __init__(self):
+        try:
+            import evdev
+            from evdev import ecodes, InputDevice
+        except ImportError:
+            print(
+                "Fail to load evdev, which is required for steering wheel control. "
+                "Install evdev via pip install evdev"
+            )
         pygame.display.init()
         pygame.joystick.init()
         assert not is_win(), "Joystick is supported in linux and mac only"

setup.py

@@ -27,7 +27,7 @@ def is_win():
 print("We will install the following packages: ", packages)
 
 """ ===== Remember to modify the PG_EDITION at first ====="""
-version = "0.2.0"
+version = "0.2.2"
 
 ext_modules = cythonize([Extension(
     "metadrive.cutils", ["metadrive/cutils.pyx"], include_dirs=[numpy.get_include()]
@@ -74,37 +74,37 @@ def is_win():
 
 msg = """
       If you encounter the following error:
-      
+
           error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
 
       Please feel free to continue! We will disable cython utility and fall back to all python code. Please enjoy!
-      
+
       """
 print(msg)
 
 """
 How to publish to pypi?  Noted by Zhenghao in Dec 27, 2020.
 
-1. Remove old files
+1. Remove old files ext_modules from setup() to get a clean wheel for all platforms in py3-none-any.wheel
     rm -rf dist/ build/ documentation/build/ metadrive.egg-info/ docs/build/
-    
+
 2. Rename current version to X.Y.Z.rcA, where A is arbitrary value represent "release candidate A". 
    This is really important since pypi do not support renaming and re-uploading.
-    
+
 3. Get wheel
     python setup.py sdist bdist_wheel
-    
+
     WARNING: wheel should not be created on windows, since assets will not be included in the .whl file !!!
 
 4. Upload to test channel
     twine upload --repository testpypi dist/*
-    
+
 5. Test as next line. If failed, change the version name and repeat 1, 2, 3, 4, 5.
     pip install --index-url https://test.pypi.org/simple/ metadrive
 
 6. Rename current version to X.Y.Z in setup.py, rerun 1, 3 steps.
 
 7. Upload to production channel 
     twine upload dist/*
-    
+
 """