List Compherension with sublist [closed]

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开发者_如何学编程 Improve this question

Suppose I have a list of sublist:

lst = [ ['A', 'is', 'from', 'B,', '2', 'm', 'from', 'C', '1.2', 'm', 'from', 'D.'], 
        ['0.3', 'm', 'from', 'D.'] ]

and I wanted to organize the letters after the word "from" so I want to have

new_lst = [ [B,C,D], [D] ]

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As you're talking about list comprehensions, you're probably writing in Python.

So I wrote the most awesome comprehension you may find to solve that problem.

>>> [[next(i) for j in i if j == 'from'] for i in (iter(x) for x in lst)]
[['B,', 'C', 'D.'], ['D.']]