Lambda functions are anonymous functions that are defined using a single expression. They are often used when you need to create a function for a short period of time and do not need to give it a permanent name. Lambda functions are defined using the
lambda keyword and can accept any number of parameters. They are often used as a concise way to define a function that will be used only once or for a short period of time.
Here is an example of how you can use a lambda function in pandas to transform a column in a DataFrame: