Parsing strings (\n and \\)

[Fredrik Lundh]

François Pinard wrote:

> A simple avenue is to get Python itself to evaluate the string as a constant
> (you ensure this by removing evaluation context).  Something like this:
>
>     PARSED = eval(UNPARSED, {}, {})

>>> UNPARSED = "__import__('os').system('echo dream on!')"
>>> PARSED = eval(UNPARSED, {}, {})
dream on!

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