Locate automatically all .py files in your project to add to sphinx engine to generate documentation.

sphinx-conf.py

# Source code base directory
PROJECT_DIR = os.path.abspath(os.path.join(os.path.join(os.getcwd()), "../../."))

# Insert Base project dir
sys.path.insert(0, os.path.abspath(os.path.join(PROJECT_DIR, "../.")))

# Run!
for root, dirs, files in os.walk(PROJECT_DIR):
    # Looking for .py files and packages
    if any(x.endswith(".py") for x in files) and any("__init__.py" in x for x in files):
        sys.path.insert(0, os.path.join(root))