Started writing script to download ACE files from NNDC site.

data/get_nndc_data.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+
+from __future__ import print_function
+import tarfile
+import urllib2
+
+baseUrl = 'http://www.nndc.bnl.gov/endf/b7.1/aceFiles/'
+files = ['ENDF-B-VII.1-neutron-293.6K.tar.gz',
+         'ENDF-B-VII.1-neutron-300K.tar.gz',
+         'ENDF-B-VII.1-neutron-900K.tar.gz',
+         'ENDF-B-VII.1-neutron-1500K.tar.gz',
+         'ENDF-B-VII.1-tsl.tar.gz']
+block_size = 16384
+
+# ==============================================================================
+# DOWNLOAD FILES FROM NNDC SITE
+
+filesComplete = []
+for f in files:
+    # Establish connection to URL
+    url = baseUrl + f
+    print('Downloading {0}... '.format(f), end='')
+    req = urllib2.urlopen(url)
+
+    # Get file size from header
+    file_size = int(req.info().getheaders("Content-Length")[0])
+    downloaded = 0
+
+    # Copy file to disk
+    with open(f, 'wb') as fh:
+        while True:
+            chunk = req.read(block_size)
+            if not chunk: break
+            fh.write(chunk)
+            downloaded += len(chunk)
+            status = "{0:10}  [{1:3.2f}%]".format(downloaded, downloaded * 100. / file_size)
+            print(status + chr(8)*len(status), end='')
+        filesComplete.append(f)
+
+# ==============================================================================
+# EXTRACT FILES FROM TGZ
+
+for f in files:
+    if not f in filesComplete:
+        continue
+
+    with tarfile.open(f, 'r') as tgz:
+        tgz.extractall(path='nndc')