How can I tell pyreverse to include classes within modules within packages?

I have this folder structure:

.
└── src
    ├── a
    │   ├── __init__.py
    │   ├── a.py
    │   └── b.py
    └── main.py

Contents of a/a.py:

class A:
    def __init__(self):
        self.name = 'a'

Contents of a/b.py

from a.a import A


class B(A):
    def __init__(self):
        self.name = 'b'

Conents of main.py:

from a.a import A
from a.b import B

print(A().name)
print(B().name)

As you can see, class B inherits from class A

I have confirmed that the program works as expected, so there are no errors in the code

I wish to run something along the lines of: pyreverse src/**/* -o png and generate a UML diagram showing me that class B inherits from class A (I have a bigger project with many more directories, hence the reason for the **/* part).

However, what I am getting at the moment is this:

The expected would be something like this:

Answering my own question: the answer was to simply cd to src/, or do this:

export PYTHONPATH="${PYTHONPATH}:${PWD}/src"