new_contents: #!/usr/bin/env python
  
  """Simple implementation of a file fetcher"""
  
  import sys
  import os
  import urllib
  import subprocess
  
  def get_bathy(url, destination=os.getcwd(), force=False):
      r"""Get bathymetry file located at `url`
  
      Will check downloaded file's suffix to see if the file needs to be extracted
      """
  
      file_name = os.path.basename(url)
      output_path = os.path.join(destination, file_name)
      if not os.path.exists(output_path) or force:
          print "Downloading %s to %s..." % (url, output_path)
          urllib.urlretrieve(url, output_path)
          print "Finished downloading."
      else:
          print "Skipping %s, file already exists." % file_name
  
      tar = False
      gunzip = False
      split_file_name = file_name.split('.')
      if split_file_name[-1] == 'gz':
          gunzip = True
          if split_file_name[-2] == 'tar':
              tar = True
      if split_file_name[-1] == 'tgz':
          gunzip = True
          tar = True
  
      if gunzip or tar:
          print "Extracting %s" % file_name
          if gunzip and tar:
              subprocess.Popen('tar xvzf %s' % output_path, shell=True)
          elif gunzip:
              subprocess.Popen('gunzip %s' % output_path, shell=True)
          elif tar:
              subprocess.Popen('tar xvf %s' % output_path, shell=True)
  
  
  if __name__ == "__main__":
      # Default URLs
      base_url = "http://users.ices.utexas.edu/~kyle/bathy/"
  
      # Override base_url
      if len(sys.argv) > 1:
          base_url = sys.argv[1]
  
      urls = [os.path.join(base_url, 'atlantic_2min.tt3'),
              os.path.join(base_url, 'newyork_3s.tt3')]
  
      for url in urls:
          get_bathy(url)
subject: Add bathy download script for atlantic