old_contents: #!/usr/bin/env python
  
  from setuptools import setup, find_packages
  
  # Get version string
  with open('gdx2py/version.py') as f:
      exec(f.read())
  
  setup(
      name='GDX2py',
      version=__version__,  # pylint: disable=undefined-variable
      author='Erkka Rinne',
      author_email='erkka.rinne@vtt.fi',
      description='Read and write GAMS Data eXchange (GDX) files using Python',
      python_requires='>=3.6',
      install_requires=['gdxcc>=7'],
      setup_requires=['pytest-runner'],
      tests_require=['pytest', 'pytest-datadir', 'pandas'],
      url='https://github.com/ererkka/GDX2py',
      packages=find_packages(exclude=['tests']),
      classifiers=[
          "Programming Language :: Python :: 3",
          "License :: OSI Approved :: MIT License",
          "Operating System :: OS Independent",
          "Topic :: Scientific/Engineering",
          "Intended Audience :: Developers",
          "Development Status :: 4 - Beta",
      ],
      license="MIT",
  )
  
new_contents: #!/usr/bin/env python
  
  from setuptools import setup, find_packages
  
  # Get version string
  with open('gdx2py/version.py') as f:
      exec(f.read())
  
  with open("README.md", "r") as f:
      readme = f.read()
  
  setup(
      name='GDX2py',
      version=__version__,  # pylint: disable=undefined-variable
      author='Erkka Rinne',
      author_email='erkka.rinne@vtt.fi',
      description='Read and write GAMS Data eXchange (GDX) files using Python',
      long_description=readme,
      long_description_content_type="text/markdown",
      python_requires='>=3.6',
      install_requires=['gdxcc>=7'],
      setup_requires=['pytest-runner'],
      tests_require=['pytest', 'pytest-datadir', 'pandas'],
      url='https://github.com/ererkka/GDX2py',
      packages=find_packages(exclude=['tests']),
      classifiers=[
          "Programming Language :: Python :: 3",
          "License :: OSI Approved :: MIT License",
          "Operating System :: OS Independent",
          "Topic :: Scientific/Engineering",
          "Intended Audience :: Developers",
          "Development Status :: 5 - Production/Stable",
      ],
      license="MIT",
  )
  
subject: Add long description to the setup script