What are the functions of lambda functions in Python?

Lambda functions in Python mainly serve the following purposes:

1. Create an anonymous function: a lambda function is a small function without a name that can be used to temporarily define a simple function.
2. Simplify function definition: lambda functions can be used to simplify some simple function definitions, avoiding writing lengthy function definition statements.
3. Lambda functions can be passed as parameters to other functions, often used to define simple callback functions.
4. Return Function: Lambda functions can be returned as the output of other functions, allowing for the dynamic generation of functions to meet varying needs.
5. Quickly implementing functional programming: lambda functions can be combined with other functional programming methods such as map, reduce, filter, etc. to provide a concise way to handle data.

It should be noted that lambda functions are typically used to define simple function logic and are not suitable for complex function definitions.