lambda python

The filter() function is used to filter the elements from given iterable collection based on applied function.

filter()函數用于根據應用函數從給定的可迭代集合中過濾元素。

Example:

例：

Given a list of integers and we have to filter EVEN integers using 1) normal way and 2) lambda and filter().

給定一個整數列表，我們必須使用1)正常方式和2)lambda和filter()來過濾偶數個整數。

1) Approach 1: Using normal way

1)方法1：使用常規方法

# function to find even number def filtereven(data):even=[]for n in data:if n%2==0:even.append(n)return even# list of integers fibo=[0,1,1,2,3,5,8,13,21,34,55] print("Orignal List :",fibo)# function call even=filtereven(fibo) print("Even List :",even)

Output

輸出量

Orignal List : [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55] Even List : [0, 2, 8, 34]

2) Approach 2: Using filter() with lambda

2)方法2：將filter()與lambda結合使用

# list of integers fibo=[0,1,1,2,3,5,8,13,21,34,55] print("Orignal List :",fibo)# filter even numbers using filter() and lambda even=list(filter(lambda n:n%2==0,fibo)) print("Even List :",even)

Output

輸出量

Orignal List : [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55] Even List : [0, 2, 8, 34]

翻譯自: https://www.includehelp.com/python/lambda-and-filter-with-example.aspx

lambda python

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