6-liner: thanks wikipedia for the equations clear solution for The Angles of a Triangle by Stensen - python coding challenges

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6-liner: thanks wikipedia for the equations solution in Clear category for The Angles of a Triangle by Stensen

from math import sqrt, acos, degrees
is_valid_triangle = lambda a, b, c: False if (a + b <= c) or (a + c <= b) or (b + c <= a) else True
def checkio(a, b, c):
    if not is_valid_triangle(a, b, c): return [0, 0, 0]
    α, β, γ = map(degrees, [acos((a**2+b**2-c**2)/(2*a*b)), acos((b**2+c**2-a**2)/(2*b*c)), acos((c**2+a**2-b**2)/(2*c*a))])
    return sorted(map(round, [α, β, γ]))

Oct. 23, 2020

Comments:

tobias.lindblom on Sept. 2, 2022, 9:20 a.m.
While fancy, using greek letters might cause problems. As sqrt is not used, it should not be imported. Some PEP violations: <ul> <li>use def for lambda assignment</li> <li>two blank lines before function</li> <li>the return[0, 0, 0] should not be on same line as if statement (PEP 8: E701)</li> <li>too long line</li> <li>no newline before EOF</li> </ul> But very easy to read code :-)

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