code: def change_branch(branch_str: str):
      branches = [add_prefix(b) for b in branch_str.split(",")]
      with open("../asv.conf.json", "r") as f:
          ss = f.read()
          config_json = json.loads(json_minify(ss))
          config_json["branches"] = branches
      with open("../asv.conf.json", "w") as f:
          json.dump(config_json, f)
  
imports: import argparse
  import json
  import os
  import re
label_desc: Use image node_id 3 for calling a global function with example usage: change_branch(branch_str) without return types