code: def is_valid_path(path):
      
      if not path.startswith('/'):
          msg = 'Invalid path "%s". Paths need to start with "/".'
          raise ValueError(msg % path[:40])
  
      for c in ' \t':
          if c in path:
              msg = ('Invalid character "%s" found in path. Paths need to be'
                     ' URL-encoded.')
              raise ValueError(msg % c)
  
      return True
docs: :return: True if the path is valid, else raise a ValueError with the
               specific error