Gain insights into functional programming in Python, learn about functions as objects, recursion, closures, and generators, and discover how to confidently apply these concepts to your projects.

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The functional programming paradigm can be a powerful tool, especially as it can be integrated seamlessly with procedural and object-oriented code in Python. 

In this course, you’ll learn what functional programming is, how it’s used, and the features of Python that support it. To start, you’ll learn how functions act as objects, the role of mutability, and how to perform recursion. 

In the latter half of the course, you’ll focus on closures, iterables & iterators, generators, and more. Throughout the course will be three exams which will test your understanding and really drive home what you’ve learned.  

By the end, you’ll have a new programming paradigm to add under your belt and have the confidence to start using functional programming in your own projects.

Learn Functional Programming in Python

# How to apply keyword arguments
A partial function can apply keyword arguments too. Here is a simple example:

def make_print(sep):
    def f(*args):
        return print(*args, sep=sep)
    return f
    
print_csv = make_print(', ')
print_colon = make_print(':')
print_csv(1, 2, 3)         # 1, 2, 3
print_colon(1, 2, 3)       # 1:2:3


The `make_print` function returns a partial application of the standard `print` function with the `sep` keyword argument set to the supplied value. `sep` is a string that gets inserted between the arguments (this is standard `print` functionality).

Notice also that the inner function, `f`, in `make_print` accepts `*args`. This means that the partially applied `print` function will accept multiple arguments and print them all, separated by the `sep` string.

We use `make_print` to create two new functions:
1. `print_csv` prints values separated by commas (line 6).
2. `print_csv` prints values separated by colons (line 7).

You can use keyword arguments with `partial` too. Here is an alternative way to create our two print functions:

Learn how partial functions apply keyword arguments. Also, look at scenarios where you can do without partial application.

Introduction

Functions as Objects

Mutability

Recursion

Functional Programming in Python - Exam 1

Closures

Iterators

Transforming Iterables

Reducing Iterables

Functional Programming in Python - Exam 2

Comprehensions

Generators

Partial Application and Currying

Functors and Monads

Functional Programming in Python - Exam 3

Useful Libraries

Conclusion

Applying Keyword Arguments

How to apply keyword arguments