First attempt clear solution for Pawn Brotherhood by songbai121 - python coding challenges

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First attempt solution in Clear category for Pawn Brotherhood by songbai121

def safe_pawns(pawns: set) -> int:
    translib = str.maketrans('abcdefgh','12345678')
    s = set()
    for pawn in pawns:
        s.add(tuple(int(x.translate(translib)) for x in pawn))
    # Make a new set to represent the position of the pawns.
    # e.g. {'b4','c3'} => {(2,4),(3,3)}
    a = [(x,y) for (x,y) in s if ((x+1,y-1)in s or (x-1,y-1) in s)]
    
    return len(a)
    

if __name__ == '__main__':
    #These "asserts" using only for self-checking and not necessary for auto-testing
    assert safe_pawns({"b4", "d4", "f4", "c3", "e3", "g5", "d2"}) == 6
    assert safe_pawns({"b4", "c4", "d4", "e4", "f4", "g4", "e5"}) == 1
    print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

Sept. 6, 2018

Comments:

spanring on Dec. 18, 2018, 1:14 p.m.
<p>ah, but instead of translib you could just use 'ord' and 'chr'</p>

Look up in the Dict()

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