Import module from subfolder in Python

I want to import modules from subfolers in Python. It works from main.py to the subfolder, but not from subfolder to subfolder. Every folder has a __init__.py

This is how the folder structure looks like:
Folder structure

I’ve created a little "class diagram", to show how it needs to be imported:
Class diagram

main.py:

#! /usr/bin/env python

import os
from dotenv import load_dotenv
from os import path
from parser.Nfdump import Nfdump

def main():
    load_dotenv()
    
    p = Nfdump(os.getenv('flow_file_location'))
    p.Parse()

if __name__ == "__main__":
    main()

Nfdump.py

#! /usr/bin/env python

from types.Flow import Flow
from typing import NamedTuple
import ipaddress


class Nfdump:
    def __init__(self, file_location):
        self.file_location = file_location

    def Parse(self):
        ##parsing magic

Flow.py:

#! /usr/bin/env python
from typing import NamedTuple
import ipaddress

class Flow(NamedTuple):
    ip_source: ipaddress.ip_address
    port_source: int
    ip_dest: ipaddress.ip_address
    port_dest: int
    flags: str

Error thrown:

ModuleNotFoundError: No module named 'types.Flow'; 'types' is not a package

I am using Python 3 (3.10.2)

>Solution :

The reason for this error is that types is already a name used by Python for the standard library.

Rename your folder from types to something else.

https://docs.python.org/3/library/types.html

In addition, you will probably have to change your imports to contain the full path, and execute it inside of the folder containing flowscanner

from flowscanner.types.Flow import Flow