4. Functions, Iterators and Generators

8 questions.

• 9. What is a Python Decorator?
• 10. How are arguments passed in a Python method? By value or by reference?
• 19. What is the difference between an Iterator and Iterable in Python?
• 20. What is the use of Generator in Python?
• 22. What is the difference between xrange and range in Python?
• 23. What is lambda expression in Python?
• 44. How can we do Functional programming in Python?
• 45. What is the improvement in enumerate() function of Python?