Filter function in Python | Python Filter Function
The filter() function returns an iterator where the items are filtered through a function to test if the item is accepted or not.
Python Notes:
What is a List?
A list is a data structure used to store a range of data in a single variable. It is defined inside the square brackets[] with values separated by commas and those values can be of any data type string, integer, float, etc.
How to Filter a List in Python?
The filter() method is a built-in python function that filters the given set of iterable with the help of a function that tests each element in the sequence to be True or False. It is useful when you have to iterate over a set of elements and differentiate elements on the basis of specific criteria.
Syntax
filter(Function,sequence)
The filter method takes two arguments:
Function: It is a User-defined set of rules to be done when a particular function is called.
Sequence: It is a set of lists or tuples that need to be filtered.
Note: It returns a function object which means you have to pass a function without calling it with a pair of parentheses () to pass a variable (definition of function) which further has to be converted into a list to view elements.
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