coords.py 文件源码

def _format_number(cls, number):
        if isinstance(number, (Number, str)):
            try:
                value = Decimal(number)
            except InvalidOperation:
                raise ValueError('Invalid coordinate format: %r' % number)
            else:
                with localcontext() as ctx:
                    ctx.prec = 13
                    ctx.rounding = ROUND_HALF_UP
                    return value + 0
        elif isinstance(number, Decimal):
            return number
        else:
            raise TypeError('Invalid coordinates type: %r' % number)