I like the spirit, however a lot of these can be done with a simple one liner...
Example for chunked iteration:<p>```<p>def chunk_iter(some_seq, n):<p><pre><code> return (seq[pos:pos + n] for pos in range(0, len(seq), n))
</code></pre>
```<p>example for multi-dict: (unless I'm missing something)<p>```<p>from collections import defaultdict<p>d = defaultdict(list)<p>d['a'].append('b')<p>d['a'].append('c')<p>dict(d)<p>{'a': ['b', 'c']}<p>```