45 filter() method in python

 

'''

1. The filter() method filters the given sequence with the help of a function and 

retun filter object.

2. filter taks two parameters one is function another one is iterable object

'''


Use lambda function with filter()

The Python built-in filter() function accepts a function and a list as an argument. 

It provides an effective way to filter out all elements of the sequence. 

It returns the new sequence in which the function evaluates to True.



## Filter with lambda function

fo = filter(lambda a: a % 2 == 0 ,[1,2,6,4,5])

print(list(fo))



#program to filter out the tuple which contains odd numbers    

lst = (10,22,37,41,100,123,29)  

oddlist = tuple(filter(lambda x:(x%3 == 0),lst)) # the tuple contains all the items of the tuple for which the lambda function evaluates to true    

print(oddlist)  


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