a = [1, 2, '1', 'd', 3, 4] 1 也就是说,无论嵌套了多少层的list,我们都想将其flatten为一层的list。 解决方案: 实现一个递归函数: def flatten(nest_list:list): out = [] for i in nest_list: if isinstance(i, list): tmp_list = flatten(i) for j in tmp_list: out.append(j)...
Every element of this list is either a sublist or a non-list item (for example an integer or string). Therefore, there is an irregularity in terms of the element type. Example:[[1, 2, 3], [4, 5], 6]where[1, 2, 3]and[4, 5]are of typelistand6is of typeint. Flatten List ...
Thereduce() functionfrom thefunctoolsmodule can also be used to flatten a list of lists. Thereduce()function applies a function of two arguments cumulatively to the items of a sequence, from left to right, so as to reduce the sequence to a single value. ...
声明:文中的方法均收集自Making a flat list out of list of lists in Python 1.定义减层方法 import functools import itertools import numpy import operator import perfplot from collections import Iterable # or from collections.abc import Iterable from iteration_utilities import deepflatten #使用两次for...
flatten = lambda x: [y for l in x for y in flatten(l)] if type(x) is list else [x] print(flatten(a)) 1. 2. 3. 4. 5. 6. 7. 2. 列表去重 列表去重可能会破坏原有的顺序,所以下面分别介绍保留顺序和不保留顺序的做法。
a=[1,2,[3,4],[[5,6],[7,8]]]flatten=lambda x:[yforlinxforyinflatten(l)]iftype(x)is listelse[x]print(flatten(a)) 2. 列表去重 列表去重可能会破坏原有的顺序,所以下面分别介绍保留顺序和不保留顺序的做法。 去重,但改变顺序 去重但改变顺序,两种方法 ...
FlattenList: [3,4,5,7,8,9,10] Explanation Here, a two-dimensional list consisting ofelements [[3, 4, 5],[ 7, 8, 9, 10]]are assigned to a variable called nested_lists. A variable called flatten_list is initialized with emptybrackets []. Then a for loop is used for iterating ...
def flatten(alist): """二维列表扁平化 """ result=[] # *** Begin ***# for i in range(2): for j in range(len(alist[i])): result.append(alist[i][j]) # *** End ***# return result #创建一个二维列表 M=eval(input()) # ...
在Python中,如何使用递归来实现flatten功能? 之前如果想使用flatten,一般借助于numpy.ndarray.flatten。 但是flatten只能适用于numpy对象,即array或者mat,普通的list列表不适用。 最近找到一个轻便的办法如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 from itertools import chain # flatten print(list(set(...
[记录点滴] 一个Python中实现flatten的方法 之前如果想使用flatten,一般借助于numpy.ndarray.flatten。 但是flatten只能适用于numpy对象,即array或者mat,普通的list列表不适用。 最近找到一个轻便的办法如下: fromitertoolsimportchain# flattenprint(list(set(chain.from_iterable(["aaa","bbb", ["c","d","e"]]...