.. glossary::
kernel
A Jupyter backend associated with a single programming language
interpreter that executes the code in a Jupyter cell and returns the
output from the executed code back to the Jupyter fronend for display.
mutable
Indicates that the Python object can be changed after it has been
created.
namespace
A set of variable names that are accessible from one region or area of a
program. For example, variables declared inside a Python function cannot
be accessed outside of that function, because they are only availabe in
that function's namespace.