Import all libraries from Python package in pantsbuild - python-3.x

Question

I want to import all the resources in my models/sources directory, into another target in pants build my contents of root/models/sources:
├── base.py
├── BUILD
├── design.py
├── email.py
├── __init__.py
└── project_management.py
The contents of my build file are as follows:
python_library(
name="base",
sources=["base.py"],
dependencies=["root/models/tokens/__init__.py:__init__"]
)
python_library(
name="design",
sources=["design.py"],
dependencies=[":base"]
)
python_library(
name="email",
sources=["email.py"],
dependencies=[":base"]
)
python_library(
name="project_management",
sources=["project_management.py"],
dependencies=[
":base",
"root/models/tokens/__init__.py:__init__"
]
)
python_library(
name="__init__",
sources=["__init__.py"],
dependencies=[
":base",
":design",
":email",
":project_management"
]
)
Now in another target, I have an
from root.models.sources import *
How would I set up the dependencies of this other target to import all the libraries in models/sources ?
p.s I know using * is not best, but that's the simplest form. Also, init is a Factory.

Answer 1

import the init as long as it's a Factory that references all the other files in the package.
eg:
from root.models.sources.base import Source
from root.models.sources.design import DesignSource
from root.models.sources.email import EmailSource
from root.models.sources.project_management import \
ProjectManagementSource
def SourceFactory(source: str = "default"):
sources = {
"default": Source,
"foo1": ProjectManagementSource,
"foo2": ProjectManagementSource,
"foo3": ProjectManagementSource,
"foo4": ProjectManagementSource,
"foo5": ProjectManagementSource,
"foo6": ProjectManagementSource,
"foo7": ProjectManagementSource,
"foo8": EmailSource,
"foo9": DesignSource,
}
return sources[source] if source in sources.keys() else Source