text: import json
  
  backups = json.loads(open("blazar2.json").read())
  
  for b in range(len(backups)):
      if backups[b]["ra"] == "77.35817":
          backups[b]["z"] = "0.336"
  
  with open("blazar2.json", "w") as f:
      f.write(json.dumps(backups))
  