Use download_file function to downlaod tar file with UVES data

Author: migueldvb

tutorials/UVES/UVES.ipynb

@@ -55,11 +55,12 @@
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "import urllib2, tarfile\n",
+      "import tarfile\n",
+      "from astropy.utils.data import download_file\n",
       "url = 'http://python4astronomers.github.io/_downloads/astropy_UVES.tar.gz'\n",
-      "tarfile.open(fileobj=urllib2.urlopen(url), mode='r|*').extractall()\n",
-      "cd UVES\n",
-      "ls"
+      "f = tarfile.open(download_file(url, cache=True), mode='r|*')\n",
+      "location_for_data_file = '.'  # CHANGE TO WHEREVER YOU WANT THE DATA TO BE EXTRACTED\n",
+      "f.extractall(path=location_for_data_file)"
      ],
      "language": "python",
      "metadata": {},
@@ -148,7 +149,7 @@
       "from astropy.io import fits\n",
       "\n",
       "# glob searches through directories similar to the Unix shell\n",
-      "filelist = glob('*.fits')\n",
+      "filelist = glob('UVES/*.fits')\n",
       "# sort alphabetically - given the way the filenames are\n",
       "# this also sorts in time\n",
       "filelist.sort()\n",
@@ -1475,4 +1476,4 @@
    "metadata": {}
   }
  ]
-}
+}