dn <pythonl...@danceswithmice.info> wrote: > On 18/02/24 09:53, Grant Edwards via Python-list wrote: > > On 2024-02-17, Cameron Simpson via Python-list <python-list@python.org> > > wrote: > >> On 16Feb2024 22:12, Chris Green <c...@isbd.net> wrote: > >>> I'm looking for a simple way to make NaN values output as something > >>> like '-' or even just a space instead of the string 'nan'. > >>> [...] > >>> > >>> Battery Voltages and Currents > >>> Leisure Battery - 12.42 volts -0.52 Amps > >>> Starter Battery - nan volts nan Amps > >>> > >>> What I would like is for those 'nan' strings to be just a '-' or > >>> something similar. > > > >> The simplest thing is probably just a function writing it how you want > >> it: > >> > >> def float_s(f): > >> if isnan(f): > >> return "-" > >> return str(f) > >> > >> and then use eg: > >> > >> print(f'value is {float_s(value)}') > >> > >> or whatever fits your code. > > > > Except he's obviously using some sort of formatting to control the > > number of columns and decimal places, so 'str(f)' is not going to cut > > it. Is the basic floating point number formatting functionality seen > > when using f-strings or '%' operator part of the float type or is it > > part of the f-string and % operator? > > It's part of the PSL's string library: "Format Specification > Mini-Language" > https://docs.python.org/3/library/string.html#format-specification-mini-language > > Has the OP stated if we're talking 'Python' or numpy, pandas, ...? > Just python, on a Raspberry Pi, so currently Python 3.9.2.
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