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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Mon, 17 Mar 2014 12:28:05 -0600
Subject: Re: 'complex' function with string argument.
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On Mon, Mar 17, 2014 at 12:15 PM, Marko Rauhamaa <marko@pacujo.net> wrote:
> Is "-2.0" a literal?
>
> What's the outcome of
>
>    -2.0.__str__()

No.  The compiler will try to optimize it into a single constant if it
can, but it has to be done in accordance with the order of operations.
 In that example, the __str__ method is called before the unary - is
applied, resulting in an error.