class_docstr: Tuple Metric 
code: def safe_div(a, b):
      if b == 0.0:
          return 0.0
      else:
          return a / b
  
imports: from collections import defaultdict
  from copy import deepcopy
  from typing import Dict, List
  import sys
label_desc: Use image node_id 3 for calling the Metric obj's underlying member method code with example usage: obj.safe_div(a, b) and returns: int, unknown