string formatting: engineering notation

[Jorge Godoy]

Steve Holden <steve at holdenweb.com> writes:

> Darren Dale wrote:
>> Does anyone know if it is possible to represent a number as a string with
>> engineering notation (like scientific notation, but with 10 raised to
>> multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
>> decimal.Decimal class, but repeatedly instantiating Decimals is inefficient
>> for my application (matplotlib plotting library). If it is not currently
>> possible, do you think the python devs would be receptive to including
>> support for engineering notation in future releases?
>>
> How close is this:
>
>  >>> "%.3e" % 3.14159
> '3.142e+00'

>>> "%.3e" % 314159
'3.142e+05'
>>> 

Not close when you have the exponent.  



-- 
Jorge Godoy      <jgodoy at gmail.com>