TimeDelta.__repr__ displays excess precision

[bkeryan]

Bug Report

nitypes.bintime.TimeDelta.__repr__ currently displays a constructor expression using decimal.Decimal, but it doesn't limit the decimal to an appropriate number of digits.

Repro or Code Sample

>>> import nitypes.bintime as bt
>>> from decimal import Decimal
>>> x = bt.TimeDelta(Decimal("1.23456789"))
>>> x
nitypes.bintime.TimeDelta(Decimal('1.234567889999999999977708248222185716258536558598279953002929688'))
>>> x._ticks
22773757908449605611
>>> y = bt.TimeDelta(Decimal('1.234567889999999999977708248222185716258536558598279953002929688'))
>>> y._ticks
22773757908449605611
>>> z = bt.TimeDelta(Decimal('1.2345678899999999999777'))
>>> z._ticks
22773757908449605611

Expected Behavior

The smallest time increment that NI-BTF can represent is 54210 yoctoseconds, so there should be no more than 24 decimal places (yoctoseconds), and preferably less.

Current Behavior

64 decimal places are displayed, because that is the precision that bintime uses to do decimal conversions.

Possible Solution

Use format strings to specify the decimal precision:

>>> "{0:.024}".format(Decimal('1.234567889999999999977708248222185716258536558598279953002929688'))
'1.23456788999999999997771'

Context

It makes the output of repr harder to read.

Your Environment

• nitypes version: 0.1.0-dev1
• Python version: 3.11.9

AB#3159517