[英]Create nested list from two lists
I have got two lists like this:我有两个这样的列表:
t = [1,2,3,4]
f = ['apples', 'oranges','grapes','pears']
I need to create a list of lists like this:我需要创建一个像这样的列表列表:
data = [
['Fruit', 'Total'],
['apples', 1],
['oranges', 2],
['grapes', 3],
['pears' 4]
]
I have done this:我已经这样做了:
l = []
l.append(['Fruit', 'Total'])
# I guess I should have check that lists are the same size?
for i, fruit in enumerate(f):
l.append([fruit, t[i]])
Just wondering if there is a more Pythonic way of doing this.只是想知道是否有更 Pythonic 的方式来做到这一点。
Using zip
and list comprehension is another way to do it.使用
zip
和列表理解是另一种方法。 ie, by doing l.extend([list(a) for a in zip(f, t)])
:即,通过执行
l.extend([list(a) for a in zip(f, t)])
:
Demo:演示:
>>> t = [1,2,3,4]
>>> f = ['apples', 'oranges','grapes','pears']
>>> l = []
>>> l.append(['Fruit', 'Total'])
>>> l.extend([list(a) for a in zip(f, t)])
>>> l
[['Fruit', 'Total'], ['apples', 1], ['oranges', 2], ['grapes', 3], ['pears', 4]]
>>>
不确定我喜欢它,但是:
r = [[f[i], t[i]] if i >= 0 else ['fruit', 'total'] for i in range(-1, len(t))]
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