old_contents: from setuptools import setup, find_packages
  
  setup(
      name="dataclasses-json",
      version="0.0.9",
      packages=find_packages(exclude=("tests*",)),
      author="lidatong",
      author_email="charles.dt.li@gmail.com",
      description="Easily serialize dataclasses to and from JSON",
      url="https://github.com/lidatong/dataclasses-json",
      license="Unlicense",
      keywords="dataclasses json",
      install_requires=[
          "dataclasses;python_version=='3.6'"
      ],
      python_requires=">=3.6",
      extras_require={
          "dev": ["pytest", "ipython", "mypy", "hypothesis"]
      },
      include_package_data=True
  )
  
new_contents: from setuptools import setup, find_packages
  
  with open('README.md', 'r', encoding='utf8') as f:
      readme = f.read()
  
  setup(
      name="dataclasses-json",
      version="0.0.9",
      packages=find_packages(exclude=("tests*",)),
      author="lidatong",
      author_email="charles.dt.li@gmail.com",
      description="Easily serialize dataclasses to and from JSON",
      long_description=readme,
      url="https://github.com/lidatong/dataclasses-json",
      license="Unlicense",
      keywords="dataclasses json",
      install_requires=[
          "dataclasses;python_version=='3.6'"
      ],
      python_requires=">=3.6",
      extras_require={
          "dev": ["pytest", "ipython", "mypy", "hypothesis"]
      },
      include_package_data=True
  )
  
subject: Add long description