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Re:Why MIT switched from Scheme to Python by rgoddard on Wednesday March 25, 2009 @10:26AM (#531842)
{} means object [] means array So you would not be able to just drop them, since they mean two different things.
Re:Why MIT switched from Scheme to Python by sharkbrainguy on Thursday March 26, 2009 @06:24AM (#533259)
for associative arrays foo: bar, for non-associative foo, bar,

surely this is unambiguous?

    x:
      y: "a",
      z: "23",
      q: 54,
         32,
         45
    ,
    r: 43