text: import NDATools
  import requests
  import json
  import sys
  
  __version__ = '0.2.5'
  pypi_version = None
  version_checked = False
  
  def check_version():
      try:
          from packaging.version import parse
      except ImportError:
          from pip._vendor.packaging.version import parse
      # use https://test.pypi.org/pypi/{package}/json on test/release branches, use https://pypi.org on master
      print('Running NDATools Version {}'.format(NDATools.__version__))
      if parse(NDATools.__version__).is_devrelease:
          return
      url_pattern = 'https://pypi.org/pypi/{package}/json'
      package = 'nda-tools'
      """Return version of package on pypi.python.org using json."""
      req = requests.get(url_pattern.format(package=package))
      version = parse('0')
      if req.status_code == requests.codes.ok:
          j = json.loads(req.text)
          releases = j.get('releases', [])
          for release in releases:
              ver = parse(release)
              if not ver.is_prerelease:
                  version = max(version, ver)
      NDATools.pypi_version = str(version)
  
      if NDATools.__version__ != NDATools.pypi_version:
          print("Your version of nda-tools is out of date. Please install the latest version ({}) from PyPi or GitHub and "
                "try again.".format(NDATools.pypi_version))
  
      NDATools.version_checked = True
  
  
  if not NDATools.version_checked:
      check_version()
  
  