1
def cross(A, B):
"Cross product of elements in A and elements in B."
return [a+b for a in A for b in B]
digits = '123456789'
rows = 'ABCDEFGHI'
cols = digits
squares = cross(rows, cols)
unitlist = ([cross(rows, c) for c in cols] +
[cross(r, cols) for r in rows] +
[cross(rs, cs) for rs in ('ABC','DEF','GHI') for cs in ('123','456','789')])
units = dict((s, [u for u in unitlist if s in u])
for s in squares)
peers = dict((s, set(sum(units[s],[]))-set([s]))
for s in squares)
누가 간단히 말해서 마지막 두 줄의 의미를 이해할 수 있습니까?프로그램 이해
감사와 동일합니다? – awsomeguy
@LewisC : Python [sets] (http://docs.python.org/2/library/stdtypes.html#set)에 대해 읽고 기본 제공 액수 – Abhijit