docstr: merge the requested PR and return the merge hash
docstr_tok: ["merge","the","requested","PR","and","return","the","merge","hash"]
code: def merge(self):
      """
      merge the requested PR and return the merge hash
      """
      commits = self._github_api.get_pr_commits(self.number)
  
      def format_commit_author(commit):
          author = commit["commit"]["author"]
          name = author["name"]
          email = author["email"]
          return f"{name} <{email}>"
  
      commit_authors = [
          format_commit_author(commit) for commit in commits
      ]
      co_authored_by_re = re.compile(
          r"^Co-authored-by:\s*(.*)", re.MULTILINE
      )
  
      def extract_co_authors(commit):
          message = commit["commit"]["message"]
          return co_authored_by_re.findall(message)
  
      commit_co_authors = []
      for commit in commits:
          commit_co_authors.extend(extract_co_authors(commit))
  
      all_commit_authors = commit_authors + commit_co_authors
      distinct_authors = sorted(
          set(all_commit_authors),
          key=lambda x: commit_authors.count(x),
          reverse=True,
      )
  
      for i, author in enumerate(distinct_authors):
          print("Author {}: {}".format(i + 1, author))
  
      if len(distinct_authors) > 1:
          primary_author, distinct_other_authors = get_primary_author(
              self.cmd, distinct_authors
          )
      else:
          # If there is only one author, do not prompt for a lead author
          primary_author = distinct_authors.pop()
          distinct_other_authors = []
  
      commit_title = f"{self.title} (#{self.number})"
      commit_message_chunks = []
      if self.body is not None:
          # Remove comments (i.e. <-- comment -->) from the PR description.
          body = re.sub(r"<!--.*?-->", "", self.body, flags=re.DOTALL)
          # avoid github user name references by inserting a space after @
          body = re.sub(r"@(\w+)", "@ \\1", body)
          commit_message_chunks.append(body)
  
      committer_name = run_cmd("git config --get user.name").strip()
      committer_email = run_cmd("git config --get user.email").strip()
  
      authors = (
          "Authored-by:"
          if len(distinct_other_authors) == 0
          else "Lead-authored-by:"
      )
      authors += " %s" % primary_author
      if len(distinct_authors) > 0:
          authors += "\n" + "\n".join(
              ["Co-authored-by: %s" % a for a in distinct_other_authors]
          )
      authors += "\n" + "Signed-off-by: %s <%s>" % (
          committer_name,
          committer_email,
      )
      commit_message_chunks.append(authors)
  
      commit_message = "\n\n".join(commit_message_chunks)
  
      # Normalize line ends and collapse extraneous newlines. We allow two
      # consecutive newlines for paragraph breaks but not more.
      commit_message = "\n".join(commit_message.splitlines())
      commit_message = re.sub("\n{2,}", "\n\n", commit_message)
  
      if DEBUG:
          print("*** Commit title ***")
          print(commit_title)
          print()
          print("*** Commit message ***")
          print(commit_message)
  
      if DEBUG:
          merge_hash = None
      else:
          result = self._github_api.merge_pr(
              self.number, commit_title, commit_message
          )
          if not result["merged"]:
              message = result["message"]
              self.cmd.fail(f"Failed to merge pull request: {message}")
          merge_hash = result["sha"]
  
      print("Pull request #%s merged!" % self.number)
      print("Merge hash: %s" % merge_hash)
  
imports: import configparser
  import os
  import pprint
  import re
  import subprocess
  import sys
  import requests
  import getpass
  from six.moves import input
  import six
label_desc: Use image node_id 7 for calling the PullRequest obj's underlying member method code with example usage: obj.merge() and returns: name, str, email, str, co_authored_by_re