from itolapi import Itol

def itol(tree_file: str, save_file: str, save_format: str) -> str:
  if tree_file[-5:] != ".tree" and tree_file[-9:] != ".tree.txt":
    raise Exception("Input tree file name must end with .tree or .tree.txt")
  if save_format not in ['png', 'svg', 'eps', 'ps', 'pdf', 'nexus', 'newick']:
    raise Exception("Unsupported save format")

  itol_uploader = Itol()
  itol_uploader.add_file(tree_file)
  itol_uploader.upload()

  itol_exporter = itol_uploader.get_itol_export()
  itol_exporter.add_export_param_dict({"format": save_format})
  itol_exporter.export(save_file)
  return itol_uploader.get_webpage()

itol("mytree.tree.txt", "save.svg", "svg")