code: def qsub_sanitize_job_name(testjobname):
      """Ensure that qsub job names must begin with a letter.
  
      Numbers and punctuation are  not allowed.
  
      >>> qsub_sanitize_job_name('01')
      'J01'
      >>> qsub_sanitize_job_name('a01')
      'a01'
      """
      if testjobname[0].isalpha():
          return testjobname
      else:
          return "J" + testjobname
  
imports: import os
  import pwd
  import re
  import subprocess
  import time
  import xml.dom.minidom
  import random
  from ...None import logging
  from ...interfaces.base import CommandLine
  from .base import SGELikeBatchManagerBase, logger
label_desc: Use image node_id 2 for calling a global function with example usage: qsub_sanitize_job_name(testjobname) and returns: testjobname, unknown