New submission from Jakub Szewczyk <jakub.szewc...@gmail.com>:

.2f produces a string representation of a float rounded up to 2 significant 
digits.

>>> print ("{:.2f}".format(1.891))
1.89

However, it does not respect locale. There is no counterpart of 'f' that would 
respect locale. There is 'n', but because it follows the rules of 'g', in many 
cases it returns a different number of significant digits. 

>>> print ("{:.2n}".format(1.891))
1.9


In all my uses of formatted float printing, I need to produce floats that are 
rounded to have the same number of significant digits. I _presume_ this 
generalizes to the majority people, and the use of 'f' option is much more 
widespread than the use of 'g'. If this is the case, then a locale-friendly 
counterpart of 'f' would be very useful.

----------
components: Extension Modules
messages: 318407
nosy: Jakub Szewczyk, eric.smith
priority: normal
severity: normal
status: open
title: string formatting that produces floats with preset precision while 
respecting locale
type: enhancement
versions: Python 3.6

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33731>
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