python循环导入问题

Question

c.py
#import w
#print("ii")
#from apps.dd.a import a
#from ayy import db
import ayy
#from w import w
#print("nn")

def cc():
    print("cc")
def o():
    print("o")

ayy.py
#from apps import ayy

#db="db"
import sys

#print(sys.path)
from apps.dd import cc##
#print("e")
#from apps.dd import c
#print("e")
ayy="ayyy"

if __name__=='__main__':
    #print(ayy)
    print("ayy.py")

dd/__init__.py
#print("o")
from apps.dd.c import cc
print("a")
from apps.dd.a import a
from apps.dd.c import o

为啥ayy里面的from apps.dd import cc
换成
from apps.dd import c就不报错了？求大佬解答，还有不要因为你不会就给踩