How to ensure a subclassed Quantity instance always renders trailing zeros to a given degree of precision

[jeffwright13]

I have a subclass based on the Quantity class

class Watt(Quantity):
    units = "W"
    prec = 2

If the value is 0, log or print statements only render 0 W, not 0.00 W. I'd like to have those trailing digits show, so text tables with the rendered Quantity values line up neatly.

Any suggestions?

Thanks, JW

[KenKundert]

The first example in Subclasing Quantities gives an example of how to do this:

>>> class Watt(Quantity):
...     units = 'W'
...     prec = 2
...     strip_zeros = False

... pwr=Watt(0)
... print(pwr)
0.00 W

If you are formatting quantities for output in tables, you might want to also take a look at Formatting Tabular Data.

[jeffwright13]

thank you