ModuleNotFoundError: No module named ‘PySide‘；qtpy.PythonQtError: No Qt bindings could be found

labelme_json_to_dataset apc2016_obj3.json -o apc2016_obj3_json

出现如下错误

Traceback (most recent call last):
  File "/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/qtpy/__init__.py", line 223, in <module>
    from PySide import __version__ as PYSIDE_VERSION  # analysis:ignore
ModuleNotFoundError: No module named 'PySide'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/shaorenjie/.conda/envs/assemblenet/bin/labelme_json_to_dataset", line 11, in <module>
    load_entry_point('labelme==4.1.0', 'console_scripts', 'labelme_json_to_dataset')()
  File "/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/pkg_resources/__init__.py", line 570, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2687, in load_entry_point
    return ep.load()
  File "/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2341, in load
    return self.resolve()
  File "/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2347, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/labelme-4.1.0-py3.6.egg/labelme/__init__.py", line 6, in <module>
    from qtpy import QT_VERSION
  File "/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/qtpy/__init__.py", line 229, in <module>
    raise PythonQtError('No Qt bindings could be found')
qtpy.PythonQtError: No Qt bindings could be found

错误原因：

/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/qtpy/__init__.py的如下出错
from PyQt5.QtCore import PYQT_VERSION_STR as PYQT_VERSION  # analysis:ignore

然后在python中测试出错代码报错信息

>>> from PyQt5.QtCore import PYQT_VERSION_STR
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: /home/shaorenjie/anaconda3/lib/libQt5Core.so.5: version `Qt_5.15' not found (required by /home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/PyQt5/QtCore.abi3.so)

解决方法：
对应so动态库没找到，在~/.bashrc中加入如下当前虚拟环境的lib目录即可

export LD_LIBRARY_PATH=/home/shaorenjie/.conda/envs/assemblenet/lib/python3.6/site-packages/PyQt5/Qt5/lib/:$LD_LIBRARY_PATH