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Why are Lambda Operators Anonymus?
Sulochana Kamshetty
2 years ago
Table of Contents
- Introduction
- Anonymous Functions
- What is Lambda Function All About…
- Why Use Lambda Functions?
Introduction
Welcome to the new
content from insideaiml, to get the idea what exactly lambda operators are and
why are they anonymous…
Lambda operators are more
incisive syntax than any other functions provided in python programming
language
Lambda functions are mostly used for higher order functions,
provided one or more arguments and return one or more functions.
Important note:- Lambda functions are restricted to single
expression.
By this end of the article we will be covering all the below
points for better understanding with few examples
- How to write lambda functions
- Which functions in the Python standard library leverage lambdas
- When to use or avoid Python lambda functions
- Let us even cover what is Anonymous functions is all about:
Anonymous Functions
These are few functions which are
interchangeably used for lambda functions
- Anonymous functions
- Lambda functions
- Lambda expressions
- Lambda abstractions
- Lambda form
- Function literals
What is Lambda Function All About…
This function
is been created with lambda keyword, considering two arguments for creating
lambda functions
To create a lambda function first write keyword lambda followed by one of more arguments
separated by comma (,), followed by colon a (:), followed by a single line expression.
X= 1
Y = 2
>>> lambda x, y: x + yOutput:-
3Lets understand few examples with different
functions…
Add 20 to
argument a, and return the result:
x = lambda a : a + 20
print(x(7))output:-
17Explanation:- This above function above
defines a lambda expression that takes two arguments and returns their sum. The expression has intake the sum of two
different parameters and added them for the output
Lets understand how to multiply the two different arguments
using lambda function..
x = lambda a, b : a * b
print(x(4,6))output:-
24Explanation :- since the
code is executed taking two argument, using lambda function for multiplying
these inputs, to get the output of multiplication of two arguments.
Example:- 3
Lets take 3 arguments and perform with lambda functions like ,
x,y,z
x
= lambda x,y,z
: x+y+z
print(x(5, 6, 2))output:-
13Exaplination:- let us make this clear understanding about
this above example 3… i.e we have
provided three arguments those are x,y,z and commanded to sum up all these
values to get the proper output..
Example:- 4
Lets understand the additional function about Immediately Invoked Function Expression which is (IIFE, pronounce “iffy”) with the coding part as
well with example
Lets create a lambda function in which am going to work with
creating variable simultaneously working with any function we perform with i.e
(lambda x, y: x + y)(2, 3)
Output:-
5 Explaination:- in python until we assign anything to the
variable the values are not stored but with the help of lambda function I have
stored the value as well as made the addition of these provided values with
output..
Example5:- assigning the function, directly to
the variable provided lambda function and getting the output with function we
are looking for..
h = lambda x: x*x*x
print(h(7)) output :
343Explanation:- the power of 7 is 343, we got
this with the help of lambda function in single code of line.
Lambda functions can be used along with built-in functions
like filter(), map() and reduce()
Why Use Lambda Functions?
The specialty of lambda function is used since its
anonymous function inside another function.
Lets understand this with the help of def function used in
python
def myfunc(n):
return lambda a : a * nA
lambda function can take any number of arguments, but can only have one
expression.
r = lambda x, y: x * y
r(12, 3) # call
the lambda functionExpected Output:
36hope this is clear about lambda operators and why they are anonymous in nature..
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