code: def __init__(self, contig, pos, ref, alts):
      self.contig = contig
      self.position = pos
      self.ref = ref
      self.alts = alts
  
imports: import gzip
  import io
  import json
  import os
  import re
  import shlex
  import subprocess
  import sys
  import time
  from typing import List
label_desc: Use image node_id 3 to create a new Variant object  with example: obj = Variant(contig, pos, ref, alts)