Python for Data Analysis: Step-By-Step with Projects - Lambda Functions, Conditional Expressions

This video tutorial introduces Lambda functions in Python, explaining their syntax and how they differ from regular functions. It demonstrates using Lambda functions in sorting and highlights their limitations. The tutorial also covers conditional expressions, showing how they can be used with Lambda functions for concise code. Examples illustrate the practical applications of these concepts.

What is a key characteristic of a Lambda function in Python?

• It must have a name.

• It can have multiple expressions.

• It is always used with a return statement.

• It is an anonymous function.

How does a Lambda function differ from a regular function?

• It can have multiple statements.

• It is defined using the 'def' keyword.

• It is limited to a single expression.

• It requires a return type.

What is the output of a Lambda function that takes an argument 'a' and returns 'a' when called with 'hello'?

• Error

• a

• hello

• None

In what scenario is a Lambda function most beneficial?

• When a function requires a complex logic.

• When a function is needed temporarily within another function.

• When a function needs to be reused multiple times.

• When defining a function with multiple statements.

Which of the following is a valid use case for a Lambda function?

• Defining a class method.

• Implementing a complex algorithm.

• Creating a standalone application.

• Sorting a list based on a custom key.

What is a conditional expression in Python also known as?

• Quaternary operator

• Unary operator

• Ternary operator

• Binary operator

How does a conditional expression evaluate in Python?

• It evaluates the first expression first.

• It evaluates the else expression first.

• It evaluates all expressions simultaneously.

• It evaluates the condition first.

What is the result of the conditional expression 'x if x > 0 else -x' when x is -5?

• -5

• Error

• 0

• 5

What is the advantage of combining Lambda functions with conditional expressions?

• It requires more code.

• It allows for multiple return values.

• It simplifies complex logic into a single line.

• It increases the execution time.

What happens when a conditional expression in a Lambda function evaluates to false?

• The function returns None.

• The else expression is evaluated and returned.

• The function throws an error.

• The function returns the original input.