Cannot open anaconda suddenly

问题

Today I found I cannot open anaconda navigator, which operated just fine before. At the same time, spyder could not be open either, but jupyter notebook and anaconda prompt are available. I tried different methods following instructions online.

1) conda update anaconda-navigator and reboot the system
2) anaconda-navigator --reset

, but it shows the error as follows:

Traceback (most recent call last):
  File "C:\Users\User\Anaconda3\lib\site-packages\qtpy\__init__.py", line 169, in <module>
    from PySide import __version__ as PYSIDE_VERSION  # analysis:ignore
ImportError: No module named 'PySide'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\User\Anaconda3\Scripts\anaconda-navigator-script.py", line 6, in <module>
    from anaconda_navigator.app.main import main
  File "C:\Users\User\Anaconda3\lib\site-packages\anaconda_navigator\app\main.py", line 22, in <module>
    from anaconda_navigator.utils.conda import is_conda_available
  File "C:\Users\User\Anaconda3\lib\site-packages\anaconda_navigator\utils\__init__.py", line 15, in <module>
    from qtpy.QtGui import QIcon
  File "C:\Users\User\Anaconda3\lib\site-packages\qtpy\__init__.py", line 175, in <module>
    raise PythonQtError('No Qt bindings could be found')
qtpy.PythonQtError: No Qt bindings could be found

(base) C:\Users\User\Anaconda3>anaconda-navigator --reset
Traceback (most recent call last):
  File "C:\Users\User\Anaconda3\lib\site-packages\qtpy\__init__.py", line 169, in <module>
    from PySide import __version__ as PYSIDE_VERSION  # analysis:ignore
ImportError: No module named 'PySide'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\User\Anaconda3\Scripts\anaconda-navigator-script.py", line 6, in <module>
    from anaconda_navigator.app.main import main
  File "C:\Users\User\Anaconda3\lib\site-packages\anaconda_navigator\app\main.py", line 22, in <module>
    from anaconda_navigator.utils.conda import is_conda_available
  File "C:\Users\User\Anaconda3\lib\site-packages\anaconda_navigator\utils\__init__.py", line 15, in <module>
    from qtpy.QtGui import QIcon
  File "C:\Users\User\Anaconda3\lib\site-packages\qtpy\__init__.py", line 175, in <module>
    raise PythonQtError('No Qt bindings could be found')
qtpy.PythonQtError: No Qt bindings could be found

So I tried different methods to reinstall pyqt as follows:

1) conda install pyqt
2) conda install --force qt 
3) pip3 install PyQt5

But still not working. I really wonder how I could fix this.

And now when I ran anaconda navigator in the prompt, I got

anaconda: error: argument : invalid choice: 'navigator' (choose from 'auth', 'label', 'channel', 'config', 'copy', 'download', 'groups', 'login', 'logout', 'notebook', 'package', 'remove', 'search', 'show', 'upload', 'whoami')

PS: my python version is 3.5, and anaconda has been updated to the latest version.

PS2-Possible Solution: I ran conda install PySide on prompt and it downgraded some of the packages, where I remembered few days ago I upgraded beautifulsou4, please be very aware when upgrading packages on anaconda !

回答1:

This error means that you installed pyqt5 with pip along side the pyqt conda package. It could be solved by you uninstalling the pip package. Try:

pip uninstall PyQt5

Then update conda:

conda update conda

and

conda update anaconda-navigator

It will surely resolve your problem.

回答2:

I just had a similar problem with Navigator. I typed anaconda-navigator on the command line and it opened fine. This doesn't explain why it won't open from the icon but does offer a work-around.

回答3:

I had exactly this problem. Same error message and all.

To fix I first updated Conda:

$ conda update conda

Then updated the navigator

$ conda update anaconda-navigator

This performed an integrity check (though it took a while - you have to be patient) and found that the environment was inconsistent. It created a package plan to download and install new packages and updates as well as downgrade some packages. It asked me to approve the change before performing the change and updating the specs. Having approved it, all was performed flawlessly and I was able to relaunch Anaconda navigator without a problem.

回答4:

Currently I have two anaconda prompt windows open on my screen, one normal, and one that is running as an Admin.

When I try 'anaconda-navigator' in the normal window, I get the same errors as you.

When I try the same command in the admin rights window, then it all works.

This isn't really a fix, but it might point someone more experienced in the right direction.

来源：https://stackoverflow.com/questions/51435579/cannot-open-anaconda-suddenly

标签

python

Anaconda

spyder