parameters: (self, expected_seq)
docstring: Initialize.
  
      Args:
        expected_seq: a sequence
docstring_summary: Initialize.
docstring_tokens: Initialize .
function: def __init__(self, expected_seq):
      """Initialize.
  
      Args:
        expected_seq: a sequence
      """
  
      self._expected_seq = expected_seq
function_tokens: def __init__ ( self , expected_seq ) : self . _expected_seq = expected_seq