tuple = ('e', (('f', ('a', 'b')), ('c', 'd')))
如何获得职位:(二叉树)
[('e', '0'), ('f', '100'), ('a', '1010'), ('b', '1011' ), ('c', '110'), ('d', '111')]
有什么方法可以indexOf?
arvore[0] # = e
arvore[1][0][0] # = f
arvore[1][0][1][0] # = a
arvore[1][0][1][1] # = b
arvore[1][1][0] # = c
arvore[1][1][1] # = d
答案 0 :(得分:5)
你需要递归遍历元组(如树):
def traverse(t, trail=''):
if isinstance(t, str):
yield t, trail
return
for i, subtree in enumerate(t): # left - 0, right - 1
# yield from traverse(subtree, trail + str(i)) in Python 3.3+
for x in traverse(subtree, trail + str(i)):
yield x
用法:
>>> t = ('e', (('f', ('a', 'b')), ('c', 'd')))
>>> list(traverse(t))
[('e', '0'), ('f', '100'), ('a', '1010'), ('b', '1011'), ('c', '110'), ('d', '111')]
顺便说一句,不要使用tuple
作为变量名。它影响内置类型/功能tuple
。