CODEWITHSUNDEEP
pythondecimal
M.E.
M.E.

Reputation: 5496

Truncate Decimal value

I have the following Python Decimal variable:

mydecimal = Decimal('1.452300')

And the following resolution variable:

resolution = Decimal('0.0001')

How could I get the variable truncated to the resolution value using just those two variables (which is the information I will have in my actual routine):

# Desired result:
truncated_mydecimal = Decimal('1.4523')  # <-- How do I get this using 'resolution' and 'mydecimal' ?

Upvotes: 4

Views: 186

Answers (1)

Tim Peters
Tim Peters

Reputation: 70582

This is what the quantize() method is for:

>>> mydecimal.quantize(resolution)
Decimal('1.4523')

Read the docs, or do

>>> help(mydecimal.quantize)

for more. Caution: the precise value of your resolution variable doesn't matter - it's the internal exponent quantize() cares about. For example, nothing about the output above would change had we done:

>>> resolution = Decimal('0.0009')

instead.

Upvotes: 5

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