Format evȺil math creative solution for Friendly Number by V.Shkaberda - python coding challenges

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Format evȺil math solution in Creative category for Friendly Number by V.Shkaberda

import math

def friendly_number(number, base=1000, decimals=0, suffix='',
                    powers=['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y']):
    """
    Format a number as friendly text, using common suffixes.
    """                              
    return '{:.0f}{:0<{dec}}{}{}'.format(*eval(
            "math.copysign(abs({n}) // {b} ** {i}, {n}),\
                  {d} and str(round(abs({n}) % {b} ** {i} / {b} ** {i}, {d}))[1:] or '',\
                            {p}[{i}],\
                              {s!r}"
            .format(n=number, b=base, d=decimals, s=suffix, p=powers, i=min(math.floor(math.log(abs(number or 1), base)), len(powers)-1))),
                      dec=decimals and decimals+1)

June 5, 2016

Comments:

Blastus on Aug. 16, 2016, 5:25 p.m.
You have a very interesting way of solving this challenge! It is nice to see some documentation, but it is very strange to see your evaluation of a string to get your code to work properly. You may also want to try eliminating all PEP8 violations next time before your publish your solution: <a href="http://pep8online.com/s/hVuIZN7F">http://pep8online.com/s/hVuIZN7F</a>

V.Shkaberda on Aug. 23, 2016, 8:09 p.m.
Well, this was inspired by Veky's <a href="https://checkio.org/mission/pawn-brotherhood/publications/veky/python-3/o-safe-pawns/">solution</a> for Pawn Brotherhood problem. The very beginning of code was: <pre class='brush: python'>integer = '{:.0f}'.format(math.copysign(abs(number) // (base ** min(math.floor/ (math.log(abs(number or 1), base)), len(powers)-1)), number)) frac = decimals and '.{:0<{}}'.format(str(round(abs(number) % (base ** min(math/ .floor(math.log(abs(number or 1), base)), len(powers)-1)) / (base ** min(math/ .floor(math.log(abs(number or 1), base)), len(powers)-1)), decimals))[2:], decimals) or '' powr = powers[min(math.floor(math.log(abs(number or 1), base)), len(powers)-1)] return integer + frac + powr + suffix </pre> Then I just decided to add some prettiness;) And what about PEP8: usually I don't bother very much about it, especially about blank lines:). But in this case I intentionally left the code a bit messy.

V.Shkaberda on Aug. 24, 2016, 7:35 a.m.
Well, this was inspired by <a href="https://checkio.org/mission/pawn-brotherhood/publications/veky/python-3/o-safe-pawns/">Veky’s solution</a> for Pawn Brotherhood problem. The very beginning of code was: <pre class='brush: python'>integer = '{:.0f}'.format(math.copysign(abs(number) // (base ** min(math.floor\ (math.log(abs(number or 1), base)), len(powers)-1)), number)) frac = decimals and '.{:0<{}}'.format(str(round(abs(number) % (base ** min(math\ .floor(math.log(abs(number or 1), base)), len(powers)-1)) / (base ** min(math\ .floor(math.log(abs(number or 1), base)), len(powers)-1)), decimals))[2:], decimals) or '' powr = powers[min(math.floor(math.log(abs(number or 1), base)), len(powers)-1)] return integer + frac + powr + suffix </pre> Then I just decided to add some prettiness;) And what about PEP8: usually I don’t bother very much about it, especially about blank lines:). But in this case I intentionally left the code a bit messy.

Strings Theory

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