Python list (list) method example, pythonlist

Python list (list) method example, pythonlist

Preface

In daily development, some API interfaces limit the number of requested elements. In this case, you need to split a large list into a fixed small list and then perform related processing, this article has collected several simple methods and shared them for your reference. Let's take a look at the detailed introduction below:

Example

#1. split the large list into a small list of three elements. If not three elements are used as a list, output In [17]: lstOut [17]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] In [18]: for I in range (0, len (lst), 3 ):...: print lst [I: I + 3]...: [0, 1, 2] [3, 4, 5] [6, 7, 8] [9] #2. with a slight improvement, a list derivation is used, and the results are put into a list In [35]: lstOut [35]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] In [36]: B = [lst [I: I + 3] for I in range (0, len (lst), 3)] in [37]: bOut [37]: [0, 1, 2], [3, 4, 5], [6, 7, 8], [9] In [38]: #3. lambda, which I don't like very much, cannot be understood by Meng Yi. I will look at the logic In [10]: f = lambda a: map (lambda B: a [B: B + 3], range (0, len (a), 3) In [11]: lstOut [11]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] In [12]: f (lst) Out [12]: [0, 1, 2], [3, 4, 5], [6, 7, 8], [9]

Summary

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