Description:
dezimal 0.4.0
Arbitrary precision decimal numbers
A module with a simple implementation for arbitrary precision
decimal numbers. The key difference to most other decimal
libraries is that there is no maximum precision for example
when doing divisions.
>>> from dezimal import Dezimal
>>> Dezimal("355") / Dezimal("113")
Dezimal('3.14159292035398230088495575221238938053097345132743362831858407079646017699115044247787610619469026548672566371681')
dezimal will calculate as many digits after the decimal point as
there are, no ROUNDING_MODE or whatever needed.
If the calculation
would result in a period, dezimal detects that and stops the calculation
as needed:
>>> Dezimal("1") / Dezimal("7")
Dezimal('0.14285714285714285')
However, it prints a minimum number of digits, as to display at least
the same precision as a regular float would (a bit more actually).
>>> Dezimal("1") / Dezimal("3")
Dezimal('0.33333333333333333')
>>> 1.0 / 3.0
0.3333333333333333
These parameters can be controlled by invoking the static div
method in Dezimal directly:
>>> Dezimal.div(Dezimal("1"), Dezimal("3"), minscale=5)
Dezimal('0.33333')
Also a maximum precision can be given:
>>> Dezimal.div(Dezimal("355"), Dezimal("113"), maxscale=30)
Dezimal('3.141592920353982300884955752212')
Construction
An instance of Dezimal can be constructed from int, float, bool,
or a str. The usual formats like 3, 3.0, 7e1, -7e-9, or
+13.03e-3 are understood.
Supported operations
The following operations are supported:
+ - * / // < <= > >= == !=
Why?
For fun.
License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
Customer Reviews
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