Python Auto Decimal Wrapper

PythonAutoDecimal.py

from decimal import Decimal, getcontext

getcontext().prec = 28

class D(Decimal):
    def __new__(cls, value):
        if isinstance(value, (float, int)):
            return super().__new__(cls, str(value))
        return super().__new__(cls, value)

print(D(115.412) - D(115.213))  # Decimal('0.199')
print(D("115.412") - D("115.213"))  # Decimal('0.199')