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iqshell

In addition to the standard qshell shell interface, we provide a kernel capable of running through Jupyter that hooks into the qshell client. The command structure and syntax is the same as qshell, so it is recommended you read that for more information about that.

Dependencies

In order to run iqshell, you must have ipykernel and jupyter_console. You can install the dependencies when you are installing qtile by running:

$ pip install qtile[ipython]

Otherwise, you can just install these two packages separately, either through PyPI or through your distribution package manager.

Installing and Running the Kernel

Once you have the required dependencies, you can run the kernel right away by running:

$ python -m libqtile.interactive.iqshell_kernel

However, this will merely spawn a kernel instance, you will have to run a separate frontend that connects to this kernel.

A more convenient way to run the kernel is by registering the kernel with Jupyter. To register the kernel itself, run:

$ python -m libqtile.interactive.iqshell_install

If you run this as a non-root user, or pass the --user flag, this will install to the user Jupyter kernel directory. You can now invoke the kernel directly when starting a Jupyter frontend, for example:

$ jupyter console --kernel qshell

The iqshell script will launch a Jupyter terminal console with the qshell kernel.

iqshell vs qshell

One of the main drawbacks of running through a Jupyter kernel is the frontend has no way to query the current node of the kernel, and as such, there is no way to set a custom prompt. In order to query your current node, you can call pwd.

This, however, enables many of the benefits of running in a Jupyter frontend, including being able to save, run, and re-run code cells in frontends such as the Jupyter notebook.

The Jupyter kernel also enables more advanced help, text completion, and introspection capabilities (however, these are currently not implemented at a level much beyond what is available in the standard qshell).