MODULE_9.md

Module 9: Functional programming

Module Description

This module introduces functional programming concepts in Python, including lambda functions, closures, iterators, generators, decorators, and comprehensions.

Assignment 1: Homework on "Introduction to Functional Programming"

• Solution
• Description: Task "Apply All Functions at Once":
  • Implement the apply_all_func function that takes a list of numbers and an arbitrary number of functions, applying each function to the list and returning a dictionary with function names as keys and their results as values.

Assignment 2: Homework on "List and Dictionary Comprehensions"

• Solution
• Description:
  • Create list and dictionary comprehensions to filter and pair elements based on string lengths, and to create a dictionary with string lengths for strings with an even length.

Assignment 3: Homework on "Generator Expressions"

• Solution
• Description:
  • Implement generator expressions to calculate differences in string lengths from two lists and to compare string lengths at the same positions without using zip.

Assignment 4: Homework on "Creating Functions on the Fly"

• Solution
• Description: Task "Functional Diversity":
  • Write a lambda function to compare character matches in two strings. Implement a closure that returns a function for writing multiple data types to a file. Also, create a class with the __call__ method that randomly returns words from a collection.

Assignment 5: Homework on "Iterators"

• Solution
• Description: Task "Range Is Simple":
  • Create an iterator class that behaves similarly to Python's range() function but allows for step validation. Implement custom error handling for invalid steps.

Assignment 6: Homework on "Generators"

• Solution
• Description:
  • Write a generator function all_variants that returns all subsequences of a given string during iteration.

Assignment 7: Homework on "Decorators"

• Solution
• Description:
  • Implement a decorator function that checks whether the result of another function (which sums three numbers) is a prime number, printing "Prime" or "Composite" based on the result.