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
          """
          # Store in case expected_seq is an iterator.
          self._expected_list = list(expected_seq)
function_tokens: def __init__ ( self , expected_seq ) : # Store in case expected_seq is an iterator. self . _expected_list = list ( expected_seq )