old_contents: import codecs
  import os
  import os.path
  from os.path import join
  
  from setuptools import setup
  
  import cffi_build.cffi_build as cffi_build
  
  
  def read(rel_path):
      here = os.path.abspath(os.path.dirname(__file__))
      with codecs.open(os.path.join(here, rel_path), 'r') as fp:
          return fp.read()
  
  
  def get_version(rel_path):
      for line in read(rel_path).splitlines():
          if line.startswith('__version__'):
              delim = '"' if '"' in line else "'"
              return line.split(delim)[1]
      else:
          raise RuntimeError("Unable to find version string.")
  
  
  # Temp fix for CoppeliaSim 4.1
  if 'COPPELIASIM_ROOT' not in os.environ:
      raise RuntimeError('COPPELIASIM_ROOT not defined.')
  with open(os.path.join(os.environ['COPPELIASIM_ROOT'], 'system', 'usrset.txt'), 'r') as f:
      usrset = f.read()
  
  if 'allowOldEduRelease' not in usrset:
      with open(os.path.join(os.environ['COPPELIASIM_ROOT'], 'system', 'usrset.txt'), 'a') as f:
          f.write('\nallowOldEduRelease=7501\n')
  
  
  setup(name='PyRep',
        # Version A.B.C.D.
        # A.B.C info corresponds to the CoppeliaSim version needed.
        # D info corresponds to the PyRep version.
        version=get_version("pyrep/__init__.py"),
        description='Python CoppeliaSim wrapper',
        author='Stephen James',
        author_email='slj12@ic.ac.uk',
        url='https://www.doc.ic.ac.uk/~slj12',
        packages=['pyrep',
                  'pyrep.backend',
                  'pyrep.objects',
                  'pyrep.sensors',
                  'pyrep.robots',
                  'pyrep.robots.arms',
                  'pyrep.robots.end_effectors',
                  'pyrep.robots.mobiles',
                  'pyrep.robots.configuration_paths',
                  'pyrep.textures',
                  'pyrep.misc',
                  ],
        ext_modules=[cffi_build.ffibuilder.distutils_extension(
            join('build', 'pyrep', 'backend'))],
        )
  
new_contents: import codecs
  import os
  import os.path
  from os.path import join
  
  from setuptools import setup
  
  import cffi_build.cffi_build as cffi_build
  
  
  def read(rel_path):
      here = os.path.abspath(os.path.dirname(__file__))
      with codecs.open(os.path.join(here, rel_path), 'r') as fp:
          return fp.read()
  
  
  def get_version(rel_path):
      for line in read(rel_path).splitlines():
          if line.startswith('__version__'):
              delim = '"' if '"' in line else "'"
              return line.split(delim)[1]
      else:
          raise RuntimeError("Unable to find version string.")
  
  
  # Temp fix for CoppeliaSim 4.1
  if 'COPPELIASIM_ROOT' not in os.environ:
      raise RuntimeError('COPPELIASIM_ROOT not defined.')
  
  usrset_file = os.path.join(os.environ['COPPELIASIM_ROOT'], 'system', 'usrset.txt')
  usrset = ''
  if os.path.isfile(usrset_file):
      with open(usrset_file, 'r') as f:
          usrset = f.read()
  
  if 'allowOldEduRelease' not in usrset:
      with open(usrset_file, 'a+') as f:
          f.write('\nallowOldEduRelease=7501\n')
  
  
  setup(name='PyRep',
        # Version A.B.C.D.
        # A.B.C info corresponds to the CoppeliaSim version needed.
        # D info corresponds to the PyRep version.
        version=get_version("pyrep/__init__.py"),
        description='Python CoppeliaSim wrapper',
        author='Stephen James',
        author_email='slj12@ic.ac.uk',
        url='https://www.doc.ic.ac.uk/~slj12',
        packages=['pyrep',
                  'pyrep.backend',
                  'pyrep.objects',
                  'pyrep.sensors',
                  'pyrep.robots',
                  'pyrep.robots.arms',
                  'pyrep.robots.end_effectors',
                  'pyrep.robots.mobiles',
                  'pyrep.robots.configuration_paths',
                  'pyrep.textures',
                  'pyrep.misc',
                  ],
        ext_modules=[cffi_build.ffibuilder.distutils_extension(
            join('build', 'pyrep', 'backend'))],
        )
  
subject: Fix usrset file check during install.