ros2和anaconda结合

[tempxl]

系统是ubuntu22.04，目前用anaconda创建了一个python环境，想在ros中使用pytorch，按照该方法尝试了一下，添加了

import sys
sys.path.append('/home/xl/anaconda3/envs/drl/lib/python3.8/site-packages')
import torch

并且关闭了conda进行编译和运行，但是报了如下的错误

Traceback (most recent call last):
  File "/home/xl/ros2_ws/install/py_pubsub/lib/py_pubsub/talker", line 33, in <module>
    sys.exit(load_entry_point('py-pubsub==0.0.0', 'console_scripts', 'talker')())
  File "/home/xl/ros2_ws/install/py_pubsub/lib/py_pubsub/talker", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 171, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/xl/ros2_ws/install/py_pubsub/lib/python3.10/site-packages/py_pubsub/publisher_member_function.py", line 18, in <module>
    import torch
  File "/home/xl/anaconda3/envs/drl/lib/python3.8/site-packages/torch/__init__.py", line 443, in <module>
    raise ImportError(textwrap.dedent('''
ImportError: Failed to load PyTorch C extensions:
    It appears that PyTorch has loaded the `torch/_C` folder
    of the PyTorch repository rather than the C extensions which
    are expected in the `torch._C` namespace. This can occur when
    using the `install` workflow. e.g.
        $ python setup.py install && python -c "import torch"

    This error can generally be solved using the `develop` workflow
        $ python setup.py develop && python -c "import torch"  # This should succeed
    or by running Python from a different directory.
[ros2run]: Process exited with failure 1

[tempxl]

@tempxl 重新用virtulenv创建了一个虚拟环境，并且装上pytorch，发现可以正常使用

[小鱼]

@tempxl anacoda3的python版本和系统的ros版本应该不匹配

[tempxl]

@小鱼 是的，anaconda创建的是python3.8，系统的是3.10

[77314390]

@tempxl 在 ros2和anaconda结合 中说：

@小鱼 是的，anaconda创建的是python3.8，系统的是3.10

你好，我也遇到了这个问题，我在conda环境python是3.7,系统是3.10, 因为想利用conda环境里的tensorflow包，然后在环境里运行不了，不知道是否因为两者python版本部匹配所导致的。

[2562812956]

@tempxl 在 ros2和anaconda结合 中说：

重新用virtulenv创建了一个虚拟环境，并且装上pytorch，发现可以正常使用

只能重新创建虚拟环境吗？我现在跑的视觉只支持3.8版本的怎么办？