code: def basepath(self) -> str:
          
          return os.path.abspath(
              os.path.join(self.projectdir, self.BASEDIR))
docs: Absolute path pointing to the available working directories.
  
          >>> from hydpy.core.filetools import FileManager
          >>> filemanager = FileManager()
          >>> filemanager.BASEDIR = 'basename'
          >>> filemanager.projectdir = 'projectname'
          >>> from hydpy import repr_, TestIO
          >>> with TestIO():
          ...     repr_(filemanager.basepath)   # doctest: +ELLIPSIS
          '...hydpy/tests/iotesting/projectname/basename'