code: def format_data(self, value: float) -> str:
      """
      Return a formatted string representation of a number.
      """
      s = locale.format_string("%1.10e", (value,))
      return self.fix_minus(s)
  
imports: import locale
  from matplotlib.ticker import FixedFormatter
label_desc: Use image node_id 1 for calling the MyFixedFormatter obj's underlying member method code with example usage: obj.format_data(value) and returns: self