Sometimes it's hard to avoid cyclic imports, without blaming the design. Like if a Parent has a Child, and the Child needs to know of the parent. Only way to solve that in python is to put everything in the same file, which also feels like bad deisgn.
I would say in that case, the Parent and Child shouldn't need to know about each other - some kind of handler in a different file should.
Although I guess that doesn't work in all cases, like defining foreign key relationships when using an orm (like sqlalchemy) for example. But in the orm case, the way to get around that is... lazy resolution :^)
