lambda – create/build function in an expresssion..

[Humble]

lambda is a wonderful feature of python which allows you to create a function without giving/referring by a name.. It make flexible coding by creating a function in an expression.. A very good use place for lambda would be returning a function call with another function..

The general form of the lambda would be :

lambda arg1, arg2, …argN : expression using arguments

For ex: lambda x,y,z: x+y+z

>>>> lambda x,y,z: x+y+z
<function <lambda> at 0x7f2f44aa3938>
>>> f= lambda x,y,z: x+y+z
>>> f
<function <lambda> at 0x7f2f44aa39b0>
>>> f(5,7,8)
20
>>> 

bullets to remember about lambda:

lambda can be used to create a short, anonymous function. lambda does not contain return statements.. Only one expression ( which return a value) can be put inside the lambda function.

[Humble]

Lambda functions are mainly used in combination with the functions filter(), map() and reduce().

[Author]

Posts