Import module from subfolder

I want to import subfolders as modules. Therefore every subfolder contains a __init__.py. My folder structure is like this:

src\  main.py  dirFoo\    __init__.py    foofactory.py    dirFoo1\      __init__.py      foo1.py    dirFoo2\      __init__.py      foo2.py

In my main script I import

from dirFoo.foofactory import FooFactory

In this factory file I include the sub modules:

from dirFoo1.foo1 import Foo1from dirFoo2.foo2 import Foo2

If I call my foofactory I get the error, that python can't import the submodules foo1 and foo2:

Traceback (most recent call last):  File "/Users/tmp/src/main.py", line 1, in <module>from dirFoo.foofactory import FooFactory  File "/Users/tmp/src/dirFoo/foofactory.py", line 1, in    <module>from dirFoo1.foo1 import Foo1    ImportError: No module named dirFoo1.foo1