Issue with dependencies -- ImportError: cannot import name getfullargspec

Question

我正在尝试在 python 中使用 mayavi 来可视化点云，但无法解决此错误。我确定这是一个简单的 pip 安装，但我不确定该命令。任何帮助深表感谢！谢谢！

顺便说一句，我是运行ning Ubuntu 18.04 并已尝试安装 scipy，如此处所述：Python import error "getfullargspec"。我还运行 pip install traitsui。此外，我已经重新启动了我的系统。

更新：进一步挖掘后，看来这可能是 Python 版本的问题。我可以使用 Python3 将其设置为运行，但不能使用 Python 2.7（我需要使用 python 2）。我还尝试将 handler.py 中的代码修改为 getargspec 而不是 getfullargspec。通过这样做

我得到了关于 trait_factory 的错误

这是完整的打印输出：

 Traceback (most recent call last):
  File "mayavi_test.py", line 3, in <module>
    from mayavi import mlab
  File "/home/user/.local/lib/python2.7/site-packages/mayavi/mlab.py", line 16, in <module>
    from mayavi.tools.camera import view, roll, yaw, pitch, move
  File "/home/user/.local/lib/python2.7/site-packages/mayavi/tools/camera.py", line 24, in <module>
    from .engine_manager import get_engine
  File "/home/user/.local/lib/python2.7/site-packages/mayavi/tools/engine_manager.py", line 12, in <module>
    from mayavi.preferences.api import preference_manager
  File "/home/user/.local/lib/python2.7/site-packages/mayavi/preferences/api.py", line 4, in <module>
    from .preference_manager import preference_manager
  File "/home/user/.local/lib/python2.7/site-packages/mayavi/preferences/preference_manager.py", line 29, in <module>
    from traitsui.api import View, Group, Item
  File "/home/user/.local/lib/python2.7/site-packages/traitsui/api.py", line 37, in <module>
    from .editors.api import (
  File "/home/user/.local/lib/python2.7/site-packages/traitsui/editors/__init__.py", line 26, in <module>
    from .api import (
  File "/home/user/.local/lib/python2.7/site-packages/traitsui/editors/api.py", line 6, in <module>
    from .array_editor import ArrayEditor
  File "/home/user/.local/lib/python2.7/site-packages/traitsui/editors/array_editor.py", line 34, in <module>
    from ..view import View
  File "/home/user/.local/lib/python2.7/site-packages/traitsui/view.py", line 41, in <module>
    from .ui import UI
  File "/home/user/.local/lib/python2.7/site-packages/traitsui/ui.py", line 51, in <module>
    from .handler import Handler, ViewHandler
  File "/home/user/.local/lib/python2.7/site-packages/traitsui/handler.py", line 27, in <module>
    from inspect import getfullargspec
ImportError: cannot import name getfullargspec