What is the Python Decimal module and how do I use it?

What is the Python Decimal module and how do I use it?

The Python Decimal module provides support for fast correctly-rounded decimal floating point arithmetic. It's useful for financial applications and other use cases where precision is crucial.

Can you show me an example of how to create a Decimal object?

Sure! You can create a Decimal object by importing the module and using it like this:

from decimal import Decimal

value = Decimal('10.5')
print(value)

How do I perform arithmetic operations with Decimal?

You can perform arithmetic operations just like with regular numbers. For example:

from decimal import Decimal

a = Decimal('10.5')
b = Decimal('2.5')

result = a + b
print(result)  # Output: 13.0

What about rounding with the Decimal module?

You can round a Decimal object using the quantize method. For example:

from decimal import Decimal, ROUND_HALF_UP

value = Decimal('10.56789')
rounded_value = value.quantize(Decimal('10.57'), rounding=ROUND_HALF_UP)
print(rounded_value)  # Output: 10.57