Python示例中的Lambda和filter用法指南 _Lambda

先决条件：Python中的Lambda
给定数字列表, 找到所有可被13整除的数字。

Input : my_list = [12, 65, 54, 39, 102, 339, 221, 50, 70]Output : [65, 39, 221]

我们可以用拉姆达内置filter()函数内部的函数, 以查找列表中所有可被13整除的数字。在Python中, 匿名函数意味着函数没有名称。
Python中的filter()函数接受一个函数和一个列表作为参数。这提供了一种精妙的方法来过滤出序列"序列"的所有元素, 为此函数返回True。

# Python Program to find numbers divisible # by thirteen from a list using anonymous # function# Take a list of numbers. my_list = [ 12 , 65 , 54 , 39 , 102 , 339 , 221 , 50 , 70 , ]# use anonymous function to filter and comparing # if divisible or not result = list ( filter ( lambda x: (x % 13 = = 0 ), my_list)) # printing the result print (result)

【Python示例中的Lambda和filter用法指南】输出如下：

[65, 39, 221]

给定一个字符串列表, 找到所有回文。

# Python Program to find palindromes in # a list of strings.my_list = [ "geeks" , "geeg" , "keek" , "practice" , "aa" ]# use anonymous function to filter palindromes. # Please refer below article for details of reversed # https://www.lsbin.org/reverse-string-python-5-different-ways/ result = list ( filter ( lambda x: (x = = "".join( reversed (x))), my_list)) # printing the result print (result)

输出：

['geeg', 'keek', 'aa']

给定一个字符串列表和一个字符串str, 打印所有str的字谜

# Python Program to find all anagrams of str in # a list of strings. from collections import Countermy_list = [ "geeks" , "geeg" , "keegs" , "practice" , "aa" ] str = "eegsk"# use anonymous function to filter anagrams of x. # Please refer below article for details of reversed # https://www.lsbin.org/anagram-checking-python-collections-counter/ result = list ( filter ( lambda x: (Counter( str ) = = Counter(x)), my_list)) # printing the result print (result)

输出：