Solve the python import package error importerror: cannot import name xxx from

Took a long time , Finally, it is found that circular references lead to . Since the circular reference , Just keep them from circular references .
Then it is normal to remove the part of the circular reference ！

terms of settlement ：
1, Disassemble into multiple files , Separate those to be referenced from each other
2, Narrow the scope of import , As usual import At the top of the file , At this time, you can import Just move to the top of the code you want to import ;