Difference between Normal def defined function and Lambda
In this article, we will discuss the difference between normal def defined function and lambda in Python.
In python, def defined functions are commonly used because of their simplicity. The def defined functions do not return anything if not explicitly returned whereas the lambda function does return an object. The def functions must be declared in the namespace. The def functions can perform any python task including multiple conditions, nested conditions or loops of any level, printing, importing libraries, raising Exceptions, etc.
The lambda functions can be used without any declaration in the namespace. The lambda functions defined above are like single-line functions. These functions do not have parenthesis like the def defined functions but instead, take parameters after the lambda keyword as shown above. There is no return keyword defined explicitly because the lambda function does return an object by default.
Table of Difference Between def and Lambda
def defined functions
Easy to interpret
Interpretation might be tricky
Can consists of any number of execution statements inside the function definition
The limited operation can be performed using lambda functions
To return an object from the function, return should be explicitly defined
No need of using the return statement
Execution time is relatively slower for the same operation performed using lambda functions
Execution time of the program is fast for the same operation
Defined using the keyword def and holds a function name in the local namespace
Defined using the keyword lambda and does not compulsorily hold a function name in the local namespace