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__author__ = 'KenMercusLai' |
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from itertools import chain |
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class Friends: |
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def __init__(self, connections): |
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self.connections = list(connections) |
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def add(self, connection): |
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if connection in self.connections: |
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return False |
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else: |
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self.connections.append(connection) |
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return True |
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def remove(self, connection): |
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if connection in self.connections: |
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self.connections.remove(connection) |
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return True |
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return False |
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def names(self): |
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return set(chain(*self.connections)) |
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def connected(self, name): |
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neighbors = [] |
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[neighbors.extend(list(i)) for i in self.connections if name in i] |
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neighbors = set(neighbors) |
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if name in set(neighbors): |
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neighbors.remove(name) |
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return neighbors |
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if __name__ == '__main__': |
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# These "asserts" using only for self-checking |
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# and not necessary for auto-testing |
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letter_friends = Friends(({"a", "b"}, {"b", "c"}, {"c", "a"}, {"a", "c"})) |
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digit_friends = Friends([{"1", "2"}, {"3", "1"}]) |
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assert letter_friends.add({"c", "d"}) is True, "Add" |
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assert letter_friends.add({"c", "d"}) is False, "Add again" |
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assert letter_friends.remove({"c", "d"}) is True, "Remove" |
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assert digit_friends.remove({"c", "d"}) is False, "Remove non exists" |
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assert letter_friends.names() == {"a", "b", "c"}, "Names" |
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assert letter_friends.connected("d") == set(), "Non connected name" |
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assert letter_friends.connected("a") == {"b", "c"}, "Connected name" |
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KenMercusLai /
checkio
