def getChildren(current,calls,blacklist=[]):
    ''' Return a list of the children of current that are not in used. '''
    return [c.target for c in calls if c.source==current and c.target not in blacklist]
def getChildren ( current , calls , blacklist = [ ] ) : return [ c . target for c in calls if c . source == current and c . target not in blacklist ]
Return a list of the children of current that are not in used.