pathspec.py 文件源码

def __iter__(self):
        stack = [ (self.__graphRoot, chain(self.__pkgRoot.getDirectDepSteps(),
                                           self.__pkgRoot.getIndirectDepSteps())) ]
        yield (self.__graphRoot, self.__pkgRoot)
        done = set([self.__graphRoot.key()])

        while stack:
            try:
                childPkg = next(stack[-1][1]).getPackage()
                childNode = stack[-1][0][childPkg.getName()].node
                if childNode.key() not in done:
                    done.add(childNode.key())
                    yield (childNode, childPkg)
                    stack.append( (childNode, chain(childPkg.getDirectDepSteps(),
                                                    childPkg.getIndirectDepSteps())) )
            except StopIteration:
                stack.pop()