flask run Error: While importing ‘project’, an ImportError was raised

Solution

/yourapplication
/yourApplicationMainFolder
    __init__.py
    /static
        style.css
    /templates
        layout.html
        index.html
        login.html
        ...

from setuptools import setup

setup(
    name='yourApplicationMainFolder',
    packages=['yourApplicationMainFolder'],
    include_package_data=True,
    install_requires=[
        'flask',
],)

pip install -e .