code: def find_step_gap(self):
      if len(self) > 1:
          return max(
              1.0, (self.last_step[1] - self.last_step[0]).item()
          )
      else:
          return 1.0
  
imports: import math
  from typing import Dict, List, Optional, Union
  from datetime import datetime, timedelta
  import numpy
label_desc: Use image node_id 3 for calling the Series obj's underlying member method code with example usage: obj.find_step_gap() and returns: max, int