old_contents: #!/usr/bin/env python
  import os
  import re
  import sys
  from codecs import open
  from distutils.core import setup
  from os import path
  
  from setuptools import find_packages
  
  
  def get_long_description():
      current_dir = path.abspath(path.dirname(__file__))
      readme_path = path.join(current_dir, "README.md")
      with open(readme_path, encoding="utf-8") as f:
          return f.read()
  
  
  def get_version():
      version_file = open(path.join("csv_export", "__init__.py"), encoding="utf-8").read()
      version_match = re.search(r"__version__ = ['\"]([0-9]+\.[0-9]+\.[0-9]+)['\"]", version_file, re.MULTILINE)
      if version_match:
          return version_match.group(1)
      raise RuntimeError("Unable to find version string.")
  
  
  if sys.argv[-1] == "publish":
      os.system("python setup.py sdist upload")  # noqa
      print("You should also add a git tag for this version:")
      print(" git tag {}".format(get_version()))
      print(" git push --tags")
      sys.exit()
  
  
  setup(
      name="django-csv-export-view",
      version=get_version(),
      license="BSD",
      description="Django class-based view for CSV exports",
      long_description=get_long_description(),
      long_description_content_type="text/markdown",
      url="https://github.com/benkonrath/django-csv-export-view",
      author="Ben Konrath",
      author_email="ben@bagu.org",
      packages=find_packages(exclude=["tests*"]),
      include_package_data=True,
      data_files=[("", ["README.md", "CHANGELOG.md"])],
      zip_safe=False,
      install_requires=[
          "django>=2.0",
      ],
      python_requires="!=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4",
      classifiers=[
          "Development Status :: 5 - Production/Stable",
          "Environment :: Web Environment",
          "Framework :: Django",
          "Intended Audience :: Developers",
          "License :: OSI Approved :: BSD License",
          "Operating System :: OS Independent",
          "Programming Language :: Python",
          "Programming Language :: Python :: 2.7",
          "Programming Language :: Python :: 3.5",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3.8",
          "Programming Language :: Python :: 3.9",
          "Topic :: Utilities",
      ],
  )
  
new_contents: #!/usr/bin/env python
  import os
  import re
  import sys
  from codecs import open
  from distutils.core import setup
  from os import path
  
  from setuptools import find_packages
  
  
  def get_long_description():
      current_dir = path.abspath(path.dirname(__file__))
      readme_path = path.join(current_dir, "README.md")
      with open(readme_path, encoding="utf-8") as f:
          return f.read()
  
  
  def get_version():
      version_file = open(path.join("csv_export", "__init__.py"), encoding="utf-8").read()
      version_match = re.search(
          r"__version__ = ['\"]([0-9]+\.[0-9]+\.[0-9]+(\.dev[0-9])?)['\"]", version_file, re.MULTILINE
      )
      if version_match:
          return version_match.group(1)
      raise RuntimeError("Unable to find version string.")
  
  
  if sys.argv[-1] == "publish":
      os.system("python setup.py sdist upload")  # noqa
      print("You should also add a git tag for this version:")
      print(" git tag {}".format(get_version()))
      print(" git push --tags")
      sys.exit()
  
  
  setup(
      name="django-csv-export-view",
      version=get_version(),
      license="BSD",
      description="Django class-based view for CSV exports",
      long_description=get_long_description(),
      long_description_content_type="text/markdown",
      url="https://github.com/benkonrath/django-csv-export-view",
      author="Ben Konrath",
      author_email="ben@bagu.org",
      packages=find_packages(exclude=["tests*"]),
      include_package_data=True,
      data_files=[("", ["README.md", "CHANGELOG.md"])],
      zip_safe=False,
      install_requires=[
          "django>=2.0",
      ],
      python_requires="!=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4",
      classifiers=[
          "Development Status :: 5 - Production/Stable",
          "Environment :: Web Environment",
          "Framework :: Django",
          "Intended Audience :: Developers",
          "License :: OSI Approved :: BSD License",
          "Operating System :: OS Independent",
          "Programming Language :: Python",
          "Programming Language :: Python :: 2.7",
          "Programming Language :: Python :: 3.5",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3.8",
          "Programming Language :: Python :: 3.9",
          "Topic :: Utilities",
      ],
  )
  
subject: Update regex to support dev versioning