Sharing Code Across Python Microservices with Poetry, Pip, and Docker

A step-by-step guide to sharing Python code across multiple microservices using a Poetry-managed shared module installed via pip inside Docker containers. Covers project structure with a monorepo layout, creating a reusable shared package with pyproject.toml, writing Dockerfiles that copy and install the shared module before the app code, and wiring everything together with Docker Compose. The result is two Flask services that both import from the same shared utility module without code duplication.