Python float – str – float weirdness

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str(0.47000000000000003) give '0.47' and float('0.47') can be 0.46999999999999997.
This is due to the way floating point number are represented (see this wikipedia article)

Note: float(repr(0.47000000000000003)) or eval(repr(0.47000000000000003)) will give you the expected result, but you should use Decimal if you need precision.

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