windows编译carla报错：Make sure it is available on your Windows “py“.

具体报错信息：

-[BuildPythonAPI]: [Batch params]: --py3
INFO: Could not find files for the given pattern(s).

-[BuildPythonAPI]: [ERROR] An error ocurred while executing the py.
-[BuildPythonAPI]: [ERROR] Possible causes:
-[BuildPythonAPI]: [ERROR]  - Make sure "py" is installed.
-[BuildPythonAPI]: [ERROR]  - Make sure it is available on your Windows "py".
make: *** [PythonAPI] Error 1
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在path_to_carla\Util\BuildTools中找到BuildPythonAPI.bat，然后编辑：

1. 更改 py -> python3：

where py 1 >nul     >>>> 	 where python3 1>nul
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2. 将py -3替换为python

来源：https://github.com/carla-simulator/carla/issues/976