python - 以 Python 方式将多个值插入到列表中

Question

我想打开这个列表：

l=["Three","Four","Five","Six"]

进入这个：

['Three', 3, 'Four', 4, 'Five', 5, 'Six', 6]

我用这段代码（效果很好）来做到这一点：

for i,j in zip(range(1,len(l)*2,2),range(3,7)*2):
    l.insert(i,j)

但我猜 Python 不会以此为荣。有没有更短的方法？

Answer 1

我可能会做这样的事情：

>>> a = ["Three","Four","Five","Six"]
>>> b = range(3,7)
>>> zip(a,b)
[('Three', 3), ('Four', 4), ('Five', 5), ('Six', 6)]
>>> [term for pair in zip(a,b) for term in pair]
['Three', 3, 'Four', 4, 'Five', 5, 'Six', 6]

或者，使用itertools.chain：

>>> from itertools import chain
>>> list(chain.from_iterable(zip(a,b)))
['Three', 3, 'Four', 4, 'Five', 5, 'Six', 6]

Answer 2

In [124]: l=["Three","Four","Five","Six"]

In [125]: [x for x in itertools.chain(*zip(l, range(3,7)))]
Out[125]: ['Three', 3, 'Four', 4, 'Five', 5, 'Six', 6]