code: def _determine_filtered_package_requirements(self):
          
          filtered_requirements = set()
          try:
              lines = self.configuration["blacklist"]["packages"]
              package_lines = lines.split("\n")
          except KeyError:
              package_lines = []
          for package_line in package_lines:
              package_line = package_line.strip()
              if not package_line or package_line.startswith("#"):
                  continue
              filtered_requirements.add(Requirement(package_line))
          return list(filtered_requirements)
docs: Parse the configuration file for [blacklist]packages
  
          Returns
          -------
          list of packaging.requirements.Requirement
              For all PEP440 package specifiers