          """ Boolean for whether system is macOS """
          return self.system.lower() == "darwin"
  
      @property
      def is_windows(self):
          """ Boolean for whether system is Windows """
          return self.system.lower() == "windows"
  
      @property
      def is_virtual_env(self):
          """ Boolean for whether running in a virtual environment """
          if not self.is_conda:
 
</s> remove     def is_macos(self):
        """ Boolean for whether system is macOS """
        return self.system.lower() == "darwin"
 </s> add     def _is_macos(self):
        """ bool: `True` if running on a macOS system otherwise ``False``. """
        return self._system["system"].lower() == "darwin" </s> remove     def is_virtual_env(self):
        """ Boolean for whether running in a virtual environment """
        if not self.is_conda:
 </s> add     def _is_virtual_env(self):
        """ bool: `True` if running inside a virtual environment otherwise ``False``. """
        if not self._is_conda: </s> remove     def is_linux(self):
        """ Boolean for whether system is Linux """
        return self.system.lower() == "linux"
 </s> add     def _is_linux(self):
        """ bool: `True` if running on a Linux system otherwise ``False``. """
        return self._system["system"].lower() == "linux" </s> remove     def is_conda(self):
        """ Boolean for whether in a conda environment """
 </s> add     def _is_conda(self):
        """ bool: `True` if running in a Conda environment otherwise ``False``. """ </s> remove     def encoding(self):
        """ Return system preferred encoding """
 </s> add     def _encoding(self):
        """ str: The system preferred encoding """
    def _is_windows(self):
        """ bool: `True` if running on a Windows system otherwise ``False``. """
        return self._system["system"].lower() == "windows"
          """ Boolean for whether system is macOS """
          return self.system.lower() == "darwin"
  
      @property
    def _is_windows(self):
        """ bool: `True` if running on a Windows system otherwise ``False``. """
        return self._system["system"].lower() == "windows"
    def _is_windows(self):
        """ bool: `True` if running on a Windows system otherwise ``False``. """
        return self._system["system"].lower() == "windows"
    def _is_windows(self):
        """ bool: `True` if running on a Windows system otherwise ``False``. """
        return self._system["system"].lower() == "windows"
  
      @property
      def is_virtual_env(self):
          """ Boolean for whether running in a virtual environment """
          if not self.is_conda:
keep keep keep keep replace replace replace keep keep keep keep keep
 Core Updates (#1015)

- Remove lib.utils.keras_backend_quiet and replace with get_backend() where relevant
- Document lib.gpu_stats and lib.sys_info
- Remove call to GPUStats.is_plaidml from convert and replace with get_backend()
- lib.gui.menu - typofix 
lib/sysinfo.py