This notebook demonstrates Python dictionary operations through a series of executed cells. It shows how to create dictionaries with various key types—strings, tuples, and mixed values—and access values by key. The code uses standard Python dictionary syntax, including colon-separated key-value pairs and curly-brace notation, with examples from an album release-year dataset. The rendered markdown includes instructional text and images, while the executable code cells run in a Jupyter environment on Cognitive Class Labs.