code: def open_pr(repo: str, path: str, release: str):
      token = os.environ.get("GH_TOKEN")
      if token is None:
          logger.info("Env var GH_TOKEN is not found. Cannot open PR.")
          return
  
      msg = "Updates from containers"
      pr_branch = "docs-smx-" + release.replace(".", "")
  
      content: str
      with open(path, "r", encoding="utf-8") as f:
          content = f.read()
  
      g = Github(token)
      r = g.get_repo(repo)
      remote_ref: GitRef
      counter = 1
      while True:
          remote_branch = f"refs/heads/{pr_branch}-{counter}"
          try:
              remote_ref = r.create_git_ref(
                  ref=remote_branch,
                  sha=r.get_branch("main").commit.sha,
              )
          except GithubException:
              logger.info(
                  "PR branch '%s' already exists. Incrementing the counter.",
                  remote_branch,
              )
              counter += 1
              if counter > 25:
                  logger.info(
                      "Failed to create a unique branch name. Giving up."
                  )
                  raise
          else:
              logger.info("Remote ref created: '%s'", remote_ref.ref)
              break
  
      f = r.get_contents(path, ref=remote_ref.ref)
      result = r.update_file(
          f.path, msg, content, branch=remote_ref.ref, sha=f.sha
      )
      diff = r.compare(
          r.get_branch("main").commit.sha, result["commit"].sha
      )
      if len(diff.files) == 0:
          logger.info("No changes to commit.")
          remote_ref.delete()
          return
  
      try:
          pr = r.create_pull(  # noqa
              title="Support matrix updates for " + release,
              body=msg,
              head=remote_ref.ref,
              base="main",
          )
          logger.info("Opened PR: '%s'", pr.html_url)
      except Exception as e:  # pylint: disable=broad-except
          logger.info("Failed to open PR: %s", e)
  
imports: import argparse
  import json
  import logging
  import os
  import subprocess
  import sys
  from collections import defaultdict
  from datetime import date
  from datetime import datetime
  from pathlib import Path
  import yaml
  from github import Github
  from github.GithubException import GithubException
  from github.GitRef import GitRef
  from semver import VersionInfo
label_desc: Use image node_id 2 for calling a global function with example usage: open_pr(repo, path, release) without return types