def getCircles(rawnodes,rawedges):
    ''' Example input:
    rawnodes = [1,2,3,4,5,6]
    rawedges = [(1,2),(1,3),(1,4),(2,4),(1,5),(5,6)]
    
    Returns an array of Circle objects with attribute child arrays populated.
    '''
    circles = []
    for x in rawnodes:
        i = Circle(str(x))
        for (p,q) in rawedges:
            if p==x:
                i.addChild(q)
        circles.append(i)
    return circles