python union find code example

Example: python union find

class DisjointSet:
    def __init__(self, n):
        self.data = list(range(n))
        self.size = n

    def find(self, index):
        return self.data[index]


	def union(self, x, y):
    	x, y = self.find(x), self.find(y)

	    if x == y:
    	    return

	    for i in range(self.size):
    	    if self.find(i) == y:
        	    self.data[i] = x


    @property
    def length(self):
        return len(set(self.data))




disjoint = DisjointSet(10)

disjoint.union(0, 1)
disjoint.union(1, 2)
disjoint.union(2, 3)
disjoint.union(4, 5)
disjoint.union(5, 6)
disjoint.union(6, 7)
disjoint.union(8, 9)

print(disjoint.data)
print(disjoint.length)


# [0, 0, 0, 0, 4, 4, 4, 4, 8, 8]
# 3