parameters: (self, filepath)
docstring: Record each tuning process and write it to a file.
docstring_summary: Record each tuning process and write it to a file.
docstring_tokens: Record each tuning process and write it to a file .
function: def __init__(self, filepath):
          """
          Record each tuning process and write it to a file.
          """
          self._fd = open(filepath, 'w', newline='')
          self.writer = csv.writer(self._fd, delimiter=DELIMITER,
                                   quotechar='\\', quoting=csv.QUOTE_MINIMAL)
  
          # Record the information of best knobs.
          self.best_id = None
          self.names = None
          self.best_values = None
          self.best_reward = None
  
          self.current_id = 0
function_tokens: def __init__ ( self , filepath ) : self . _fd = open ( filepath , 'w' , newline = '' ) self . writer = csv . writer ( self . _fd , delimiter = DELIMITER , quotechar = '\\' , quoting = csv . QUOTE_MINIMAL ) # Record the information of best knobs. self . best_id = None self . names = None self . best_values = None self . best_reward = None self . current_id = 0