[Fixed]-Mypy gives an error while importing submodule : Module has no attribute

It appears that your problem is similar to this issue raised in mypy‘s github repo:

Module X has no attribute Y, since version 0.700 (works fine with 0.670)

wherein the author of the issue originally ran mypy with the following line

RUN mypy --strict ./mypackage/tests.py

and solved the problem by running mypy by adding on the --implicit-reexport flag as follows:

RUN mypy --strict --implicit-reexport ./mypackage/tests.py