# === mod1.py ===
from foo import bar
from mod2 import x

bar.print_info(x)

# === mod2.py ===

from mod3 import get_w
from foo import bar

class x(object):
    def __init__(self):
        self.s = "HELLO"

bar.connect(x, get_w())

# === mod3.py ===
from mod2 import x
from foo import bar

def get_w():
    class w(object):
        def __init__(self):
            self.z = "SDFD"
    return w

bar.connect(w, x)