adding get_text_list helper inspired in django's one

IPython/utils/text.py

@@ -724,3 +724,32 b" def columnize(items, separator=' ', displaywidth=80):"
     fmatrix = [filter(None, x) for x in matrix]
     sjoin = lambda x : separator.join([ y.ljust(w, ' ') for y, w in zip(x, info['columns_width'])])
     return '\n'.join(map(sjoin, fmatrix))+'\n'
+
+
+def get_text_list(list_, last_word='and', wrap_item_with=""):
+    """
+    Return a string with a natural enumeration of items
+
+    >>> get_text_list(['a', 'b', 'c', 'd'])
+    'a, b, c and d'
+    >>> get_text_list(['a', 'b', 'c'], 'or')
+    'a, b or c'
+    >>> get_text_list(['a', 'b'], 'or')
+    'a or b'
+    >>> get_text_list(['a'])
+    'a'
+    >>> get_text_list([])
+    ''
+    >>> get_text_list(['a', 'b'], wrap_item_with="`")
+    '`a` and `b`'
+    """
+    if len(list_) == 0:
+        return ''
+    if wrap_item_with:
+        list_ = ['%s%s%s' % (wrap_item_with, item, wrap_item_with) for
+                 item in list_]
+    if len(list_) == 1:
+        return list_[0]
+    return '%s %s %s' % (
+        ', '.join(i for i in list_[:-1]),
+        last_word, list_[-1])
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