Update 2013-09-30-Jonathan-Python-Names-Code.md

Added content.

_posts/jpulliza/2013-09-30-Jonathan-Python-Names-Code.md

@@ -6,6 +6,32 @@ title: Jonathan's Python Names Code
 ---
 
 ```python
+def add_names(list_of_names, file):
+  """
+  Opens and adds a list of names to the end of a file, each on its own line
+  """
+  # We open a file in 'a' mode, for appending to it.
+  names_file = open(file, 'a')
+
+  # For each line in the list, we print that to the file. 
+  # This assumes one file per line.
+  for name in list_of_names:
+    print >> names_file, name
+
+  # Close the file so the changes are visible.
+  print file + ' written successfully'
+  names_file.close()
+
+
+# Exercise: make new_names customizible:
+new_names = input('Enter a list of names:')
+
+# Exercise: make the file name used here customizible:
+
+file = input('Enter a file name:')
+
+add_names(new_names, file)
+