Python

Configuration Example

[project]
name      = "my-python-app"
root      = "."
languages = ["python"]

[resolve.python]
src_root      = "."
package_names = ["domain", "usecase", "infrastructure"]

[[layers]]
name            = "domain"
paths           = ["domain/**"]
dependency_mode = "opt-in"
allow           = []
external_mode   = "opt-out"
external_deny   = []

[[layers]]
name            = "usecase"
paths           = ["usecase/**"]
dependency_mode = "opt-in"
allow           = ["domain"]
external_mode   = "opt-out"
external_deny   = []

[[layers]]
name            = "infrastructure"
paths           = ["infrastructure/**"]
dependency_mode = "opt-out"
deny            = []
external_mode   = "opt-out"
external_deny   = []

src/ Layout (namespace packages)

When using a src/ layout with imports like from src.domain.entity import Foo, mille init automatically adds src to package_names:

[resolve.python]
src_root      = "."
package_names = ["src"]   # ← auto-set by mille init

Import Classification

Import	Classification
from .sibling import X (relative)	Internal
import domain.entity (matches package_names)	Internal
from src.domain.entity import Foo	Internal (when src is in package_names)
import os, import sqlalchemy	External

Submodule Imports

external_allow = ["matplotlib"] correctly allows both import matplotlib and import matplotlib.pyplot.