Lambda functions in Python are anonymous functions that can be defined and declared inline with the rest of the code.
In Python, a lambda function is a concise way to create small, anonymous functions. Unlike regular functions defined with the def keyword, lambda functions are created using the lambda keyword and are typically used for short, immediate operations.
- Concise code: Lambda functions can be defined in a single line of code, making them easy to use and read.
- Easy to use functions from another Python file: You can use lambda functions to define a function that can be used from another Python file.
- Functional programming: Lambda functions enable Python programmers to use functional programming techniques, making it easier to write pure and modular code.
- Syntax: Lambda functions are written in a single line of code and don't require the def keyword. Regular functions are defined using the def keyword and can be written in multiple lines.
- Arguments: Lambda functions can have any number of arguments but can only have one expression. Regular functions can take any number of arguments and can have multiple expressions.
- Name: Lambda functions are anonymous, meaning they don't have a name. Regular functions have a name that is used to call the function.
- Scope: Lambda functions are limited in terms of scope and can only access global variables. Regular functions have a wider scope and can access both local and global variables.
- Keep your Lambda functions short and simple: Lambda functions are best used for small operations that can be written concisely in a single line of code. If your function is too long or complex, it might be better to write a regular Python function.
- Use Lambda functions with map(), filter(), and reduce(): These higher-order functions require a function argument, and Lambda functions are a great way to create simple functions on the fly.
- Don't overuse Lambda functions: While Lambda functions can be useful for certain tasks, they can also make your code less readable if overused. If your Lambda expression in Python is getting too long, it might be better to write a regular Python function instead.
