old_contents: import asyncio
  import subprocess
  from collections import defaultdict
  
  from .logger import log
  
  
  class HomeBrew:
      __slots__ = ("_installed", "_uses")
  
      def __init__(self):
          self._installed = self._get_installed()
          self._uses = {}
          self._get_uses()
  
      def _get_installed(self):
          result = subprocess.check_output(["brew", "list"])
          installed = result.split()
          return [r.decode() for r in installed]
  
      def _get_uses(self):
          tasks = [self._get_uses_for_package(package) for package in self._installed]
          asyncio.run(asyncio.wait(tasks))
  
      async def _get_uses_for_package(self, package):
          uses = await asyncio.create_subprocess_shell(
              f"brew uses --installed {package}",
              stdout=asyncio.subprocess.PIPE,
              stderr=asyncio.subprocess.STDOUT,
          )
          stdout, _ = await uses.communicate()
          self._uses[package] = stdout.decode().split()
  
      @property
      def installed_packages(self):
          return self._installed
  
      @property
      def packages_not_needed_by_other(self):
          return {key: val for key, val in self._uses.items() if not val}
  
      @property
      def packages_needed_by_other(self):
          return {key: val for key, val in self._uses.items() if val}
  
      @property
      def package_dependencies(self):
          dependencies = defaultdict(list)
          for package, needed_by in self.packages_needed_by_other.items():
              for needed in needed_by:
                  dependencies[needed].append(package)
          return {needed: sorted(packages) for needed, packages in dependencies.items()}
  
      @property
      def info(self):
          log(
              self.installed_packages,
              self.packages_not_needed_by_other,
              self.packages_needed_by_other,
              self.package_dependencies,
          )
  
new_contents: import asyncio
  import subprocess
  from collections import defaultdict
  
  from .logger import log
  
  
  class HomeBrew:
      __slots__ = ("_installed", "_uses")
  
      def __init__(self):
          self.update()
  
      def update(self):
          self._installed = self._get_installed()
          self._uses = {}
          self._get_uses()
  
      def _get_installed(self):
          result = subprocess.check_output(["brew", "list"])
          installed = result.split()
          return [r.decode() for r in installed]
  
      def _get_uses(self):
          tasks = [self._get_uses_for_package(package) for package in self._installed]
          asyncio.run(asyncio.wait(tasks))
  
      async def _get_uses_for_package(self, package):
          uses = await asyncio.create_subprocess_shell(
              f"brew uses --installed {package}",
              stdout=asyncio.subprocess.PIPE,
              stderr=asyncio.subprocess.STDOUT,
          )
          stdout, _ = await uses.communicate()
          self._uses[package] = stdout.decode().split()
  
      @property
      def installed_packages(self):
          return self._installed
  
      @property
      def packages_not_needed_by_other(self):
          return {key: val for key, val in self._uses.items() if not val}
  
      @property
      def packages_needed_by_other(self):
          return {key: val for key, val in self._uses.items() if val}
  
      @property
      def package_dependencies(self):
          dependencies = defaultdict(list)
          for package, needed_by in self.packages_needed_by_other.items():
              for needed in needed_by:
                  dependencies[needed].append(package)
          return {needed: sorted(packages) for needed, packages in dependencies.items()}
  
      @property
      def info(self):
          log(
              self.installed_packages,
              self.packages_not_needed_by_other,
              self.packages_needed_by_other,
              self.package_dependencies,
          )
  
subject: Add update method