This pattern was originally described in Martin Fowler’s article!!
We can summarized it this way: Object A creation depends on another object properties. Therefore A have a dependecy of B. There are several ways to reduce this problem, and B creation is also possible easily using keyword arguments. I dont know why but they always use the engine/car example.
Interestingly to remark that for python it is debatable a useful pattern actually. But there are many micro-frameworks and tools for python .