How to create a RPM which install python dependencies?

I have a python application that has flask dependency.

All I need is to create an RPM out of this application and with this RPM I should be able to install the dependencies to another machine.

Things I have tried,

1. Created a setup.py file,

setup(
    name='sample-package',
    version='1.0.0.0',
    author="Niranj Rajasekaran",
    author_email="nrajasekaran@test.com",
    package_dir={'': 'src/py'},
    namespace_packages=['main'],
    packages=find_packages('src/py/'),
    install_requires=['Flask']
)

2. Ran this command

   python setup.py bdist_rpm

3. Got two RPMs in dist/, one is noarch and other is src

4. I tried to install noarch rpm using this

   yum install {generated-file}.rpm

I am able to get sample-package-1.0.0.0.egg file in site-packages but not flask.

Two questions,

1. Is my approach correct?
2. If so what is something that I am missing?

bdist_rpm lacks of a lot of functionality and IMO is not very well maintained. E.g. pyp2rpm is much better for converting existing PyPI modules. But your module does not seem to be on PyPI, so you need to specify it to bdist_rpm manually because it cannot retrieve this information from setup.py.

Run:

python setup.py bdist_rpm --requires python-flask

This will produce an rpm file which requires the python-flask package. For more recent RHEL/Fedora it would be python3-flask.