Engineering numerical format PEP discussion

Keith keith.brafford at
Mon Apr 26 01:10:03 EDT 2010

On Apr 26, 12:29 am, Steven D'Aprano <st... at REMOVE-THIS-> wrote:
> On Sun, 25 Apr 2010 20:36:22 -0700, Keith wrote:
>>no one talks about 4.7e-5F, as they would rather see 47e-6
>>(micro).  Instead of 2.2e-2, engineers need to see 22.0e-3 (milli).

>I'd be cautious about making claims about "no one"

Good point, and I don't intend to belittle scientific computing folks
for whom traditional floating point representation is expected.

Nor am I suggesting that any of the six format specifiers that we
already have for scientific notation (e, E, f, F, g, G) be altered in
any way.

I guess I wasn't clear about the F in the 4.7e-5F in the example.
People doing engineering don't use 4.7e-5 Farads.  They typically have
to do extra work to get that number to print out correctly, as 47 e-6
Farads.  The same goes for lots of signal processing entities.  People
doing things with Hz, seconds, you name it, have the same problem.


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