new_contents: import os
  
  # Convoluted import for StringIO in order to support:
  #
  # - Python 3 - io.StringIO
  # - Python 2 (optimized) - cStringIO.StringIO
  # - Python 2 (all) - StringIO.StringIO
  
  try:
      import cStringIO as StringIO
  except ImportError:
      try:  # cStringIO not available on this system
          import StringIO
      except ImportError:  # Python 3
          from io import StringIO
      else:
          from StringIO import StringIO
  else:
      from StringIO import StringIO
  
  from .las import LASFile
  
  
  def open(filename, **kwargs):
      """Open an example LAS file from lasio's test suite.
  
      Args:
          filename (str): forward-slash separated filename of a LAS file from
              lasio's test suite, starting from the "tests/examples" subfolder
              e.g. "1001178549.las" or "2.0/sample_2.0.las"
  
      Other keyword arguments are passed to `lasio.LASFile`. If lasio has been
      installed locally from source, then the local version of the example file
      will be opened. If lasio has not been installed from source then the LAS 
      file will be downloaded from GitHub.
  
      Returns: LASFile object
  
      """
      local_path = get_local_examples_path()
      if os.path.isdir(local_path):
          return open_local_example(filename, **kwargs)
      else:
          return open_github_example(filename, **kwargs)
  
  
  def open_github_example(
      filename,
      url_prefix="https://raw.githubusercontent.com/kinverarity1/lasio/master/tests/examples/",
      **kwargs
  ):
      """Open an example LAS file from lasio's test suite on GitHub
  
      Args:
          filename (str): forward-slash separated filename of a LAS file from
              lasio's test suite, starting from the "tests/examples" subfolder
              e.g. "1001178549.las" or "2.0/sample_2.0.las"
  
      Other keyword arguments are passed to `lasio.LASFile`.
  
      Returns: LASFile object
  
      """
      url = url_prefix + filename
      try:
          import urllib2
  
          response = urllib2.urlopen(url)
          encoding = response.headers.getparam("charset")
          file_ref = StringIO(response.read())
          logger.debug("Retrieved data had encoding {}".format(encoding))
      except ImportError:
          import urllib.request
  
          response = urllib.request.urlopen(url)
          if response.headers.get_content_charset() is None:
              if "encoding" in encoding_kwargs:
                  encoding = encoding_kwargs["encoding"]
              else:
                  encoding = "utf-8"
          else:
              encoding = response.headers.get_content_charset()
          file_ref = StringIO(response.read().decode(encoding))
      return LASFile(file_ref, **kwargs)
  
  
  def open_local_example(filename, **kwargs):
      """Open an example LAS file from lasio's test suite.
  
      Args:
          filename (str): forward-slash separated filename of a LAS file from
              lasio's test suite, starting from the "tests/examples" subfolder
              e.g. "1001178549.las" or "2.0/sample_2.0.las"
  
      Other keyword arguments are passed to `lasio.LASFile`. If lasio has not been
      installed from source then an exception will be raised.
  
      Returns: LASFile object
  
      """
      examples_path = get_local_examples_path()
      return LASFile(os.path.join(examples_path, *filename.split("/")), **kwargs)
  
  
  def get_local_examples_path():
      """Return the path to the examples from lasio's test suite, if it is
      installed locally.
  
      Returns: path as str.
  
      """
      import lasio
  
      return os.path.join(
          os.path.abspath(os.path.abspath(lasio.__file__)), "tests", "examples"
      )
  
subject: Add lasio.examples file