<p>我正在创建一个函数,这个函数应用于元组时应该返回元组中的偶数索引元素。为什么不返回第四个索引元素?在</p>
<pre><code>def oddTuples(aTup):
'''
aTup: a tuple
returns: tuple, every other element of aTup.
'''
evenIndex = ()
evenTuple = ()
for i in aTup:
if aTup.index(i)%2 == 0:
evenIndex = evenIndex + (aTup.index(i),)
evenTuple += (aTup[aTup.index(i)],)
return evenTuple
</code></pre>