Ubuntu 18.04下Jupyter无法导入create_prompt_application问题求助

Hey there, let's break down why your Jupyter Notebook is failing to connect to the kernel and fix it step by step!

What's Causing the Problem? #

Your issue boils down to a version compatibility conflict between IPython and prompt-toolkit:

• You're running IPython 5.5.0, which relies on the prompt-toolkit 1.x series. But your installed prompt-toolkit is 2.0.9, where the create_prompt_application function (that IPython 5.x needs) has been removed or renamed. This is exactly why you're seeing the ImportError when the kernel tries to start.
• On top of that, your jupyter-console 6.0.0 requires prompt-toolkit between 2.0.0 and 2.0.1, which clashes with IPython 5.5.0's need for prompt-toolkit 1.x. These conflicting dependency requirements are breaking the kernel startup.

Fixes to Try #

You have two solid options to resolve this conflict:

Option 1: Downgrade to Compatible Versions (Match IPython 5.x) #

This involves downgrading prompt-toolkit to the 1.x series that IPython 5.5.0 supports, and also downgrading jupyter-console to a version that works with prompt-toolkit 1.x:

# Uninstall the conflicting packages first
pip3 uninstall -y prompt-toolkit jupyter-console

# Install compatible versions
pip3 install prompt-toolkit==1.0.15 jupyter-console==5.2.0

After running these commands, restart your Jupyter Notebook and try opening the .ipynb file again. The kernel should connect successfully now.

Option 2: Upgrade IPython to Support prompt-toolkit 2.x #

IPython 6.x and newer versions are designed to work with prompt-toolkit 2.x. Since you're using Python 3.6, the latest compatible IPython version is 7.16.1 (newer IPython versions drop support for Python 3.6). Run this command to upgrade:

pip3 install ipython==7.16.1

Once the upgrade finishes, restart Jupyter Notebook—your kernel should start without the import error.

Verify the Fix #

After applying either option, you can double-check that your versions are compatible with these commands:

# Check IPython version
ipython --version

# Check prompt-toolkit version
pip3 show prompt-toolkit

Make sure:

• If you went with Option 1: IPython 5.5.0 + prompt-toolkit 1.0.15
• If you went with Option 2: IPython 7.16.1 + prompt-toolkit 2.0.9 (or another 2.x version within jupyter-console's required range)

内容的提问来源于stack exchange，提问作者Amin Merati