javascript error: ipython is not defined

Cause of error javascript error: ipython is not defined

This error javascript error: ipython is not defined occurs while plotting something on the JupyterLab using IPython. People seem to notice that the following code works fine for the spyder but can’t go the same in the case of Jupyter Labs. The error code that appears looks like as given below:

Solution 

Python was used to create IPython, an interactive shell. It offers a more beneficial shell environment for running Python code in the REPL (Read Eval Print Loop). By including tools like syntax highlighting and code completion, among others, it becomes more engaging. Jupyter Notebooks and other tools are included with IPython.

It is now necessary to use the Jupyter Console, a terminal-based console frontend for Jupyter kernels, as the IPython console has been deprecated.

Through the jupyter-matplotlib addon, Jupyter Lab supports interactive Matplotlib. The installation process is a little more difficult, but it still functions. Ipympl has this requirement as well because the ipympl Jupyter Lab version needs NodeJS, and NodeJS needs Windows 8.1.

The iPython magic command must once again be used before plotting:

Use

%matplotlib widget

Installation

The suggested version to use with Jupyter Lab when utilizing this addon is 3.

Using Conda 

conda install -c conda-forge ipympl

# If using JupyterLab 2
conda install nodejs
jupyter labextension install @jupyter-widgets/jupyterlab-manager
jupyter lab build

# Later, if updating a previous Lab install:
conda install ipympl
jupyter lab build

Using pip

pip install ipympl

# If using JupyterLab 2
pip install nodejs
jupyter labextension install @jupyter-widgets/jupyterlab-manager
jupyter labextension install jupyter-matplotlib

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