old_contents: # -*- coding: utf-8 -*-
  #
  # Copyright (c) 2019, the cclib development team
  #
  # This file is part of cclib (http://cclib.github.io) and is distributed under
  # the terms of the BSD 3-Clause License.
  
  """cclib: parsers and algorithms for computational chemistry
  
  cclib is a Python library that provides parsers for computational
  chemistry log files. It also provides a platform to implement
  algorithms in a package-independent manner.
  """
  
  from __future__ import absolute_import, with_statement
  
  import setuptools
  
  
  # Chosen from http://www.python.org/pypi?:action=list_classifiers
  classifiers = """Development Status :: 5 - Production/Stable
  Environment :: Console
  Intended Audience :: Science/Research
  Intended Audience :: Developers
  License :: OSI Approved :: BSD License
  Natural Language :: English
  Operating System :: OS Independent
  Programming Language :: Python
  Topic :: Scientific/Engineering :: Chemistry
  Topic :: Software Development :: Libraries :: Python Modules"""
  
  
  def setup_cclib():
  
      doclines = __doc__.split("\n")
  
      setuptools.setup(
          name="cclib",
          version="1.6.2",
          url="http://cclib.github.io/",
          author="cclib development team",
          author_email="cclib-users@lists.sourceforge.net",
          maintainer="cclib development team",
          maintainer_email="cclib-users@lists.sourceforge.net",
          license="BSD 3-Clause License",
          description=doclines[0],
          long_description="\n".join(doclines[2:]),
          classifiers=classifiers.split("\n"),
          platforms=["Any."],
          packages=setuptools.find_packages(exclude=['*test*']),
          entry_points={
              'console_scripts': [
                  'ccframe=cclib.scripts.ccframe:main',
                  'ccget=cclib.scripts.ccget:ccget',
                  'ccwrite=cclib.scripts.ccwrite:main',
                  'cda=cclib.scripts.cda:main'
              ]
          },
          install_requires=[
              "packaging>=19.0",
              "numpy",
              "six",
          ],
  
      )
  
  
  if __name__ == '__main__':
      setup_cclib()
  
new_contents: # -*- coding: utf-8 -*-
  #
  # Copyright (c) 2019, the cclib development team
  #
  # This file is part of cclib (http://cclib.github.io) and is distributed under
  # the terms of the BSD 3-Clause License.
  
  """cclib: parsers and algorithms for computational chemistry
  
  cclib is a Python library that provides parsers for computational
  chemistry log files. It also provides a platform to implement
  algorithms in a package-independent manner.
  """
  
  from __future__ import absolute_import, with_statement
  
  import setuptools
  
  
  # Chosen from http://www.python.org/pypi?:action=list_classifiers
  classifiers = """Development Status :: 5 - Production/Stable
  Environment :: Console
  Intended Audience :: Science/Research
  Intended Audience :: Developers
  License :: OSI Approved :: BSD License
  Natural Language :: English
  Operating System :: OS Independent
  Programming Language :: Python
  Topic :: Scientific/Engineering :: Chemistry
  Topic :: Software Development :: Libraries :: Python Modules"""
  
  
  def setup_cclib():
  
      doclines = __doc__.split("\n")
  
      setuptools.setup(
          name="cclib",
          version="1.6.2",
          url="http://cclib.github.io/",
          author="cclib development team",
          author_email="cclib-users@lists.sourceforge.net",
          maintainer="cclib development team",
          maintainer_email="cclib-users@lists.sourceforge.net",
          license="BSD 3-Clause License",
          description=doclines[0],
          long_description="\n".join(doclines[2:]),
          classifiers=classifiers.split("\n"),
          platforms=["Any."],
          packages=setuptools.find_packages(exclude=['*test*']),
          entry_points={
              'console_scripts': [
                  'ccframe=cclib.scripts.ccframe:main',
                  'ccget=cclib.scripts.ccget:ccget',
                  'ccwrite=cclib.scripts.ccwrite:main',
                  'cda=cclib.scripts.cda:main'
              ]
          },
          install_requires=[
              "packaging>=19.0",
              "numpy",
              "periodictable",
              "six",
          ],
  
      )
  
  
  if __name__ == '__main__':
      setup_cclib()
  
subject: Add periodictable to install_requires