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``python-future``: pure Python implementation of Python 3 round().
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    See Python 3 documentation: uses Banker's Rounding.

    Delegates to the __round__ method if for some reason this exists.

    If not, rounds a number to a given precision in decimal digits (default
    0 digits). This returns an int when called with one argument,
    otherwise the same type as the number. ndigits may be negative.

    See the test_round method in future/tests/test_builtins.py for
    examples.
    it	__round__s"negative ndigits not supported yett10tnumpytroundingN(tFalsetNonetTruethasattrRtNotImplementedErrorRRtreprttypetfloatt
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return_inttexponenttd((s</usr/lib/python2.7/site-packages/future/builtins/newround.pytnewrounds*
	
	
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|d|�|�}|S(	s�Converts a float to a decimal number, exactly.

    Note that Decimal.from_float(0.1) is not the same as Decimal('0.1').
    Since 0.1 is not exactly representable in binary floating point, the
    value is stored as the nearest representable value which is
    0x1.999999999999ap-4.  The exact equivalent of the value in decimal
    is 0.1000000000000000055511151231257827021181583404541015625.

    >>> Decimal.from_float(0.1)
    Decimal('0.1000000000000000055511151231257827021181583404541015625')
    >>> Decimal.from_float(float('nan'))
    Decimal('NaN')
    >>> Decimal.from_float(float('inf'))
    Decimal('Infinity')
    >>> Decimal.from_float(-float('inf'))
    Decimal('-Infinity')
    >>> Decimal.from_float(-0.0)
    Decimal('-0')

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