# setup.py
from setuptools import setup, find_packages

setup(
    name="mypackage",
    version="1.0",
    packages=find_packages()
)

# analytics/stats.py
from .utils import format_number

import math as m

print(m.pi)     # Output: 3.141592653589793

3.141592653589793

my_package/
│── __init__.py
│── analytics/
│   ├── __init__.py
│   └── stats.py

import math

help(math)

Help on built-in module math:

NAME
    math

DESCRIPTION
    This module provides access to the mathematical functions
    defined by the C standard.

FUNCTIONS
    acos(x, /)
        Return the arc cosine (measured in radians) of x.

        The result is between 0 and pi.

    acosh(x, /)
        Return the inverse …

from my_package import greet

print(greet())

# my_package/__init__.py
from .module1 import greet

pip list

# file: math_utils.py
def add(a, b):
    return a + b

my_package/
│── __init__.py
│── module1.py
│── module2.py