Format Python Decimal object to a specified precision

Question

I\'ve spent countless hours researching, reading, testing, and ultimately confused and dismayed at Python\'s Decimal object\'s lack of the most fundamental concept: Formatti

Answer 1

def d(_in, decimal_places = 3):
    ''' Convert number to Decimal and do rounding, for doing calculations
        Examples:
          46.18271  to   46.183   rounded up
          46.18749  to   46.187   rounded down
          117.34999999999999 to 117.350
         _rescale is a private function, bad practice yet works for now.
    '''
    return Decimal(_in)._rescale(-decimal_places, 'ROUND_HALF_EVEN')

Edit: Again, _rescale() is not meant to be used by us regular bipeds, it works in Python 2.7, is not available in 3.4.