old_contents: from setuptools import setup
  
  setup(
      name="pycpfcnpj",
      version="1.7.0",
      description="Python module for brazilian register numbers for persons (CPF) and companies (CNPJ).",
      classifiers=[
          "Development Status :: 5 - Production/Stable",
          "License :: OSI Approved :: MIT License",
          "Programming Language :: Python :: 3",
          "Programming Language :: Python :: 3.2",
          "Programming Language :: Python :: 3.3",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3.8",
          "Topic :: Software Development :: Libraries :: Python Modules",
      ],
      keywords="cpf cnpj validation generation",
      url="https://github.com/matheuscas/pycpfcnpj",
      author="Matheus Cardoso",
      author_email="matheus.mcas@gmail.com",
      license="MIT",
      packages=["pycpfcnpj"],
      test_suite="nose.collector",
      tests_require=["nose"],
      zip_safe=False,
  )
  
new_contents: from setuptools import setup
  
  setup(
      name="pycpfcnpj",
      version="1.7.0",
      description="Python module for brazilian register numbers for persons (CPF) and companies (CNPJ).",
      classifiers=[
          "Development Status :: 5 - Production/Stable",
          "License :: OSI Approved :: MIT License",
          "Programming Language :: Python :: 3",
          "Topic :: Software Development :: Libraries :: Python Modules",
      ],
      keywords="cpf cnpj validation generation",
      url="https://github.com/matheuscas/pycpfcnpj",
      author="Matheus Cardoso",
      author_email="matheus.mcas@gmail.com",
      license="MIT",
      packages=["pycpfcnpj"],
      test_suite="nose.collector",
      tests_require=["nose"],
      zip_safe=False,
  )
  
subject: simplify setup. It's a python 3 module and it has nothing specific to any python 3 version