code: def get_entry(self, pathname_name):
          
          pathname_name = self._normalized_entryname(pathname_name)
          return self.contents[pathname_name]
docs: Retrieves the specified child file or directory entry.
  
          Args:
              pathname_name: The basename of the child object to retrieve.
  
          Returns:
              The fake file or directory object.
  
          Raises:
              KeyError: if no child exists by the specified name.