Solution to 'AttributeError: module 'IPython.utils.traitlets' has no attribute 'Unicode'

If you encounter this error, it indicates that the 'Unicode' attribute is not found in the 'traitlets' module of IPython.utils.

Possible Solution:

This error often occurs when there is a version mismatch or a conflict in the traitlets module. You can try the following steps to resolve it:

  1. Update IPython and traitlets:
  2. pip install --upgrade ipython traitlets
  3. Restart your Jupyter notebook or IPython session.
  4. If the issue persists, check for conflicting installations of IPython or traitlets. You may need to uninstall and reinstall them.
  5. pip uninstall ipython traitlets
    pip install ipython traitlets
  6. Verify the version compatibility between IPython and traitlets.
  7. pip show ipython traitlets
  8. Ensure that your code is using the correct import statements:
  9. from traitlets import Unicode
  10. If the problem persists, consider looking for any specific dependencies in your project that might be causing conflicts.

After trying these steps, the 'AttributeError' should be resolved. If the issue persists, further investigation into your specific environment and dependencies may be required.

I encountered the same error when running from google.colab import output.

As a workaround, I copied the 'traitlets' module directory to the IPython.utils module directory and backed up IPython.utils/ After that, I didn't encounter any import errors. Below is the execution script.

!cp -r /home/engbjapan/.local/lib/python3.10/site-packages/traitlets /home/engbjapan/.local/lib/python3.10/site-packages/IPython/utils/

!mv /home/engbjapan/.local/lib/python3.10/site-packages/IPython/utils/ /home/engbjapan/.local/lib/python3.10/site-packages/IPython/utils/

from IPython.utils import traitlets

> IPython.utils.traitlets.traitlets.Unicode

from google.colab import output
# No error

from google.colab.patches import cv2_imshow
# No error