Explore the design principles behind creating a Pythonic query language in this 30-minute EuroPython 2020 conference talk. Learn about WOQLpy, an open-source query language that allows users to build queries in Python for TerminusDB, a knowledge graph database. Discover the challenges faced in developing a Python-based query language, the methods used, and the underlying ideas and theories. Watch a live demonstration of WOQLpy in action, showcasing database creation, schema design, data loading from CSVs, query construction, and graph visualization using a single Python script. Participate in an interactive discussion on best practices for Python package design, contributing your opinions through a live voting system. Gain insights into creating useful Python packages for the community, regardless of your experience level, and be inspired to contribute to open-source projects.