问题：
ERROR: Failed building wheel for mujoco-py
Failed to build mujoco-py
ERROR: Could not build wheels for mujoco-py, which is required to install pyproject.toml-based projects
起因：
一开始我使用这个命令安装pip install mujoco_py，应该下载的是最新版的mujoco_py
提示一堆话：
python main.py --algo=hjdqn --env=HalfCheetah-v2 --max_iter=1e6You appear to be missing MuJoCo. We expected to find the file here: /home/zhouy24/.mujoco/mujoco210This package only provides python bindings, the library must be installed separately.Please follow the instructions on the README to install MuJoCohttps://github.com/openai/mujoco-py#install-mujocoWhich can be downloaded from the websitehttps://www.roboti.us/index.htmlTraceback (most recent call last):File "main.py", line 1, in <module>from algorithms.ddpg.ddpg import run_ddpgFile "/data/zhouy24Files/HJDQN/HJQ/algorithms/ddpg/ddpg.py", line 4, in <module>import mujoco_pyFile "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/site-packages/mujoco_py/__init__.py", line 2, in <module>from mujoco_py.builder import cymj, ignore_mujoco_warnings, functions, MujocoExceptionFile "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/site-packages/mujoco_py/builder.py", line 503, in <module>mujoco_path = discover_mujoco()File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/site-packages/mujoco_py/utils.py", line 78, in discover_mujocoraise Exception(message)
Exception:
You appear to be missing MuJoCo. We expected to find the file here: /home/zhouy24/.mujoco/mujoco210This package only provides python bindings, the library must be installed separately.Please follow the instructions on the README to install MuJoCohttps://github.com/openai/mujoco-py#install-mujocoWhich can be downloaded from the websitehttps://www.roboti.us/index.html
这里简要说明期望：mujoco210
You appear to be missing MuJoCo. We expected to find the file here: /home/zhouy24/.mujoco/mujoco210
查看了下应该是环境问题，发现期望的 MuJoCo 版本（即 mujoco210）通常与 mujoco_py 的版本相关。
对于mujoco_py 版本：较新的 mujoco_py 版本（例如 2.1 及以上）可能只支持 MuJoCo 2.1。如果你安装了较新的 mujoco_py，但只安装了 MuJoCo 2.0，系统就会找不到对应的版本，导致错误提示。
但是我安装的就是2.0
于是我就想着指定个低点的版本，环境说是mujoco-py 2.0.2，我就选了2.0.2.13版本
然后就出现一堆问题：
(HJDQN) zhouy24@RL-DSlab:~$ pip install mujoco_py==2.0.2.13
Collecting mujoco_py==2.0.2.13Using cached mujoco-py-2.0.2.13.tar.gz (792 kB)Installing build dependencies ... doneWARNING: Missing build requirements in pyproject.toml for mujoco_py==2.0.2.13 from https://files.pythonhosted.org/packages/2f/48/b108057c1a23c8da9f4cdc7a7c46ab7cec49c3563c0706d50f2527de6ba0/mujoco-py-2.0.2.13.tar.gz#sha256=d6ae66276b565af9063597fda70683a89c7356290f5ac3961b794ee90ec50eea.WARNING: The project does not specify a build backend, and pip cannot fall back to setuptools without 'wheel'.Getting requirements to build wheel ... doneInstalling backend dependencies ... donePreparing metadata (pyproject.toml) ... done
Requirement already satisfied: glfw>=1.4.0 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.13) (2.7.0)
Requirement already satisfied: imageio>=2.1.2 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.13) (2.15.0)
Requirement already satisfied: cffi>=1.10 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.13) (1.15.1)
Requirement already satisfied: Cython>=0.27.2 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.13) (3.0.11)
Requirement already satisfied: fasteners~=0.15 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.13) (0.19)
Requirement already satisfied: numpy>=1.11 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.13) (1.19.5)
Requirement already satisfied: pycparser in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from cffi>=1.10->mujoco_py==2.0.2.13) (2.21)
Requirement already satisfied: pillow>=8.3.2 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from imageio>=2.1.2->mujoco_py==2.0.2.13) (8.4.0)
Building wheels for collected packages: mujoco-pyBuilding wheel for mujoco-py (pyproject.toml) ... errorERROR: Command errored out with exit status 1:command: /home/zhouy24/miniconda3/envs/HJDQN/bin/python3.6 /home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py build_wheel /tmp/tmpvd7diq0bcwd: /tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4Complete output (91 lines):running bdist_wheelrunning buildperformance hint: mujoco_py/cymj.pyx:67:5: Exception check on 'c_warning_callback' will always require the GIL to be acquired.Possible solutions:1. Declare 'c_warning_callback' as 'noexcept' if you control the definition and you're sure you don't want the function to raise exceptions.2. Use an 'int' return type on 'c_warning_callback' to allow an error code to be returned.performance hint: mujoco_py/cymj.pyx:104:5: Exception check on 'c_error_callback' will always require the GIL to be acquired.Possible solutions:1. Declare 'c_error_callback' as 'noexcept' if you control the definition and you're sure you don't want the function to raise exceptions.2. Use an 'int' return type on 'c_error_callback' to allow an error code to be returned.Error compiling Cython file:------------------------------------------------------------...See c_warning_callback, which is the C wrapper to the user defined function'''global py_warning_callbackglobal mju_user_warningpy_warning_callback = warnmju_user_warning = c_warning_callback^------------------------------------------------------------mujoco_py/cymj.pyx:92:23: Cannot assign type 'void (const char *) except * nogil' to 'void (*)(const char *) noexcept nogil'. Exception values are incompatible. Suggest adding 'noexcept' to the type of 'c_warning_callback'.Error compiling Cython file:------------------------------------------------------------...See c_warning_callback, which is the C wrapper to the user defined function'''global py_error_callbackglobal mju_user_errorpy_error_callback = err_callbackmju_user_error = c_error_callback^------------------------------------------------------------mujoco_py/cymj.pyx:127:21: Cannot assign type 'void (const char *) except * nogil' to 'void (*)(const char *) noexcept nogil'. Exception values are incompatible. Suggest adding 'noexcept' to the type of 'c_error_callback'.Removing old mujoco_py cext /tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/generated/cymj_2.0.2.13_36_linuxcpuextensionbuilder_36.soCompiling /tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/cymj.pyx because it changed.[1/1] Cythonizing /tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/cymj.pyxTraceback (most recent call last):File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 363, in <module>main()File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 345, in mainjson_out['return_val'] = hook(**hook_input['kwargs'])File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 262, in build_wheelmetadata_directory)File "/tmp/pip-build-env-91o0qevb/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 231, in build_wheelwheel_directory, config_settings)File "/tmp/pip-build-env-91o0qevb/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 215, in _build_with_temp_dirself.run_setup()File "/tmp/pip-build-env-91o0qevb/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 268, in run_setupself).run_setup(setup_script=setup_script)File "/tmp/pip-build-env-91o0qevb/overlay/lib/python3.6/site-packages/setuptools/build_meta.py", line 158, in run_setupexec(compile(code, __file__, 'exec'), locals())File "setup.py", line 51, in <module>'Programming Language :: Python :: 3 :: Only',File "/tmp/pip-build-env-91o0qevb/overlay/lib/python3.6/site-packages/setuptools/__init__.py", line 153, in setupreturn distutils.core.setup(**attrs)File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/distutils/core.py", line 148, in setupdist.run_commands()File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/distutils/dist.py", line 955, in run_commandsself.run_command(cmd)File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/distutils/dist.py", line 974, in run_commandcmd_obj.run()File "/tmp/pip-build-env-91o0qevb/normal/lib/python3.6/site-packages/wheel/bdist_wheel.py", line 299, in runself.run_command('build')File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/distutils/cmd.py", line 313, in run_commandself.distribution.run_command(command)File "/home/zhouy24/miniconda3/envs/HJDQN/lib/python3.6/distutils/dist.py", line 974, in run_commandcmd_obj.run()File "setup.py", line 29, in runimport mujoco_py # noqa: force buildFile "/tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/__init__.py", line 3, in <module>from mujoco_py.builder import cymj, ignore_mujoco_warnings, functions, MujocoExceptionFile "/tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/builder.py", line 510, in <module>cymj = load_cython_ext(mujoco_path)File "/tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/builder.py", line 105, in load_cython_extcext_so_path = builder.build()File "/tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/builder.py", line 221, in buildbuilt_so_file_path = self._build_impl()File "/tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/builder.py", line 273, in _build_implso_file_path = super()._build_impl()File "/tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/builder.py", line 234, in _build_impldist.ext_modules = cythonize([self.extension])File "/tmp/pip-build-env-91o0qevb/overlay/lib/python3.6/site-packages/Cython/Build/Dependencies.py", line 1154, in cythonizecythonize_one(*args)File "/tmp/pip-build-env-91o0qevb/overlay/lib/python3.6/site-packages/Cython/Build/Dependencies.py", line 1321, in cythonize_oneraise CompileError(None, pyx_file)Cython.Compiler.Errors.CompileError: /tmp/pip-install-_xct9sqd/mujoco-py_80b9891289254647b90a6b144834bee4/mujoco_py/cymj.pyx----------------------------------------ERROR: Failed building wheel for mujoco-py
Failed to build mujoco-py
ERROR: Could not build wheels for mujoco-py, which is required to install pyproject.toml-based projects
再次降低版本：pip install mujoco_py==2.0.2.8 发现成功
(HJDQN) zhouy24@RL-DSlab:~$ pip install mujoco_py==2.0.2.8
Collecting mujoco_py==2.0.2.8Using cached mujoco_py-2.0.2.8-py3-none-any.whl (4.0 MB)
Requirement already satisfied: cffi>=1.10 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.8) (1.15.1)
Requirement already satisfied: fasteners~=0.15 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.8) (0.19)
Requirement already satisfied: numpy>=1.11 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.8) (1.19.5)
Requirement already satisfied: imageio>=2.1.2 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.8) (2.15.0)
Requirement already satisfied: glfw>=1.4.0 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.8) (2.7.0)
Requirement already satisfied: Cython>=0.27.2 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from mujoco_py==2.0.2.8) (3.0.11)
Requirement already satisfied: pycparser in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from cffi>=1.10->mujoco_py==2.0.2.8) (2.21)
Requirement already satisfied: pillow>=8.3.2 in ./miniconda3/envs/HJDQN/lib/python3.6/site-packages (from imageio>=2.1.2->mujoco_py==2.0.2.8) (8.4.0)
Installing collected packages: mujoco-pyAttempting uninstall: mujoco-pyFound existing installation: mujoco-py 2.1.2.14Uninstalling mujoco-py-2.1.2.14:Successfully uninstalled mujoco-py-2.1.2.14
Successfully installed mujoco-py-2.0.2.8
