Gain insights into Python by exploring basic to advanced concepts, including loops, classes, and GUIs with Tkinter. Delve into testing and become a productive Python programmer.

complete.tar.gz

InputN-copy

Error-copy

In this course, you will get a comprehensive overview of Python. You will start by laying the foundation and learning the introductory topics like operators, conditional statements, functions, loops, assignment statements, and more. You will then move onto more advanced topics such as classes and inheritance, iterators, list comprehensions, and dictionaries. Along with this, you will also get to explore the concept of testing and take a look at how GUI applications can be designed using Tkinter, Python's standard GUI library. 

By the time you're done, you'll be able to hit the ground running and be equipped with the tools that will allow you to be productive in Python.

Python 3: From Beginner to Advanced

def fib(n):
    # The first and second values will always be fixed
    first = 0
    second = 1

    if n < 1:
        return -1

    if n == 1:
        return first

    if n == 2:
        return second

    count = 3  # Starting from 3 because we already know the first two values
    while count <= n:
        fib_n = first + second
        first = second
        second = fib_n
        count += 1  # Increment count in each iteration
    return fib_n

n = 7
print(fib(n))

# Explanation

The first thing we need to do is handle all the edge cases. At **line 6**, if `n` is **less than 1**, we simply have to **return -1**. 

From **lines 9 to 13**, if `n` is **1 or 2**, we have to return the `first` or `second` value in the series. Since we already know these are always **0** and **1**, we can easily check for them at the start.

Now, our `while` loop begins at **line 16**. A `for` loop would work just as well here. Our iterator is the `count` variable, which we declared at **line 15**. We assigned it a value of **3** because we already handled the first two values in the series.

From **lines 17 to 20**, in every iteration, we use the previous two terms in the sequence, which are `second` and `fib_n`. These become `first` and `second` in the next iteration.

In the end, `fib_n` will hold the _final nth value_ in the Fibonacci sequence.

This review explains the solution for the "Fibonacci series" problem.

Introduction

The Absolute Bare Minimum

Better Tools

Classes

Getting Fancy

Testing

Graphical User Interfaces

Modules

Appendix

I Guess We're Doing Python Now Exam

Solution Review: Implementing the Fibonacci Series

Solution

Explanation