old_contents: from setuptools import setup, find_namespace_packages
  
  setup(
      name="pptrees",
      version="1.2.5",
      description="Parallel Prefix tree generation library",
      url="https://github.com/tdene/synth_opt_adders",
      author="tdene",
      author_email="teodord.ene@gmail.com",
      license="Apache 2.0",
      classifiers=[
          "Development Status :: 3 - Alpha",
          "Topic :: System :: Hardware",
          "License :: OSI Approved :: Apache Software License",
          "Programming Language :: Python :: 3",
      ],
      keywords=["hardware adders prefix"],
      package_dir={"": "src"},
      packages=find_namespace_packages(where="src"),
      package_data={"pptrees": ["mappings/*.v"]},
      long_description=open("README.md").read(),
      long_description_content_type="text/markdown",
      python_requires=">=3.7.*",
      install_requires=["networkx", "pydot", "graphviz", "Pillow"],
  )
  
new_contents: from setuptools import setup, find_namespace_packages
  
  setup(
      name="pptrees",
      version="1.2.5",
      description="Parallel Prefix tree generation library",
      url="https://github.com/tdene/synth_opt_adders",
      author="tdene",
      author_email="teodord.ene@gmail.com",
      license="Apache 2.0",
      classifiers=[
          "Development Status :: 3 - Alpha",
          "Topic :: System :: Hardware",
          "License :: OSI Approved :: Apache Software License",
          "Programming Language :: Python :: 3",
      ],
      keywords=["hardware adders prefix"],
      package_dir={"": "src"},
      packages=find_namespace_packages(where="src"),
      package_data={"pptrees": ["mappings/*.v"]},
      long_description=open("README.md").read(),
      long_description_content_type="text/markdown",
      python_requires=">=3.6.*",
      install_requires=["networkx", "pydot", "graphviz", "Pillow"],
  )
  
subject: Change requirement to Python 3.6