[PD] "wrong" floating point values in pyext

[Tim Blechmann]

> However if I set this float x to a floating point value like "0.02",
> Pd will print a value that is only near the target value: 
> 
> "x 0.2" results in a printout of 0.20000000298
> 
> Is there something wrong? 

IEEE 754 floating point numbers aren't able to encode 0.2 ... pd's
print is rounding to 6 digits, python doesn't round, though ...

see http://en.wikipedia.org/wiki/IEEE_floating-point_standard for
details ...

tim

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