golden ratio

golden_ratio.py

#!/usr/bin/env python3

def is_more_golden_than( a, b , gs=1):
    goldstandard = gs
    ao=a
    bo=b
    # TODO: use math to refactor the next 6 lines
    a = a / goldstandard
    b = b / goldstandard
    wa =  a if a < 1 else -1/a
    wb =  b if b < 1 else -1/b
    wa = abs(abs(wa)-1)
    wb = abs(abs(wb)-1)
    judgement = True if wa < wb else False
    print(f'{ao:>5.3} vs {bo:<5.3} > {wa:+.3f}, {wb:+.3f}  golden = {gs:0.2f}   {judgement}'  )
    return judgement

is_more_golden_than(1.5 , 0.66666   , gs=1  )
is_more_golden_than(2.0 , 2.1       , gs=2  )
is_more_golden_than(1.9 , 2.0       , gs=2  )
is_more_golden_than(1.9 , 2.1       , gs=2  )
is_more_golden_than(0.25, 0.75      , gs=0.5)

# output:
#   1.5 vs 0.667 > +0.333, +0.333  golden = 1.00   True  
#   2.0 vs 2.1   > +0.000, +0.048  golden = 2.00   True  
#   1.9 vs 2.0   > +0.050, +0.000  golden = 2.00   False 
#   1.9 vs 2.1   > +0.050, +0.048  golden = 2.00   False 
#  0.25 vs 0.75  > +0.500, +0.333  golden = 0.50   False