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Getting started with Python 3

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Part 1. [Introduction]

Hello and welcome to this tutorial series on Python programming language. In this video, we’ll be taking a closer look at what Python is and its various use cases. Python is a high-level, interpreted, and dynamic programming language that is widely used across many industries and applications. In this video, we’ll be discussing what makes Python so special, its origins, and how it’s being used today.

Section 1: What is Python?

Python is a popular, high-level programming language that was created in the late 1980s by Guido van Rossum. It was designed to be easy to read and write, which makes it a great choice for beginners, as well as for experienced programmers. Python is an interpreted language, meaning that it doesn’t need to be compiled before it’s run, which makes it fast and efficient. It’s a dynamic language, which means that its variables don’t need to be declared before they’re used, and its data types can change at runtime.

Section 2: Why use Python?

One of the biggest reasons that Python is so popular is its simplicity and ease of use. Its syntax is straightforward, which makes it easy to learn, even if you’re new to programming. Python also has a large and active community, which means that there are many resources available to help you get started, such as online forums, tutorials, and libraries.

Section 3: Use Cases of Python

Python is used in a wide range of applications, from scientific and numerical computing to web development and automation. Some of the most popular use cases of Python include:

  • Web development: Python is used to create websites and web applications, using frameworks such as Django and Flask.
  • Scientific and Numerical Computing: Python is used in many scientific and numerical applications, thanks to its powerful libraries, such as Numpy and Pandas.
  • Data analysis and Visualization: Python is used to process and analyze data, and to create visualizations, using libraries such as Matplotlib and Seaborn.
  • Automation: Python is used to automate repetitive tasks, such as file processing, web scraping, and testing.
  • Machine Learning: Python is used to implement machine learning algorithms, using libraries such as TensorFlow and scikit-learn.

Conclusion: That’s a quick overview of what Python is and its use cases. In the next video, we’ll be diving into the basics of setting up a Python development environment and getting started with your first Python program. If you’re new to programming, Python is a great place to start, and if you’re already experienced, you’ll find that Python is a powerful and versatile language that is used in many different applications. So stay tuned for the next video in this series and let’s get started!

Section 4: Installing and setting up the development environment

In this video, we’re going to be getting started with Python 3 by installing it and setting up a development environment.

[Step 1: Downloading Python 3]

  • First, let’s download the latest version of Python 3 from the official website, python.org
  • You can choose the version that is compatible with your operating system, and click on the “Download” button.

[Step 2: Installing Python 3]

  • Once the download is complete, open the installer and follow the prompts to install Python 3 on your computer.
  • Make sure to check the option to add Python to your system path during the installation process.

[Step 3: Verifying the installation]

  • To make sure that the installation was successful, open a command prompt or terminal and type “python3” and press enter.
  • This should display the version of Python that you have installed, and give you a prompt where you can enter Python commands.

[Step 4: Setting up an IDE or Text Editor]

  • Now that Python is installed, you’ll need an IDE or text editor to write and run your Python code.
  • There are many options available such as IDLE, PyCharm, Visual Studio Code, Sublime Text, etc.
  • You can choose the one that you feel comfortable with, or you can try a few different options to see which one you prefer.

[Step 5: Creating your first Python program]

  • To create your first Python program, open your IDE or text editor and create a new file with a “.py” file extension.
  • In this file, you can start writing your Python code.
  • For example, you can start with a simple “Hello, World!” program by typing “print(“Hello, World!”)” and save the file.

[Step 6: Running your program]

  • To run your program, you can use your IDE or text editor’s built-in run or debug functionality.
  • Or you can use the command prompt or terminal to navigate to the folder where your program is located, and type “python file_name.py” and press enter.

And that’s it! You’ve successfully installed Python 3 and set up a development environment

Check out the next section of this video for a step-by-step guide to installing python3 on your PC.

Part 2. [A comprehensive step-by-step guide to “Install Python 3” on different OS]

Here is a comprehensive step by step to “Install Python 3” on different:

[Step 1:Follow step one above]

[Step 2: Installing Python 3]

Once the download is complete, open the installer and follow the prompts to install Python 3 on your computer.

For Windows:

  • Double-click on the downloaded installer and click “Next”
  • Select the options you want to install and click “Next”
  • Select the destination folder where you want to install Python and click “Next”
  • Select the options to add Python to your system path and to create a shortcut in the start menu and click “Next”
  • Click “Install” to begin the installation process
  • Once the installation is complete, click “Finish”

For macOS:

  • Open the downloaded installer and drag the Python icon to the Applications folder
  • Once the installation is complete, you can find Python in your Applications folder

For Linux:

  • Open the terminal and navigate to the folder where the downloaded installer is located
  • Run the command “sudo sh file_name.sh” to start the installation process
  • Follow the prompts to complete the installation
  • Once the installation is complete, you can find Python in the /usr/local/bin directory.
  • Make sure to check the option to add Python to your system path during the installation process. This will allow you to run Python from the command line or terminal regardless of the current directory.

To verify the installation, you can open a command line or terminal and type “python3” and press enter. This should display the version of Python that you have installed, and give you a prompt where you can enter Python commands.

[Note]:

  • Depending on your operating system and the package manager you are using, you can also install python via a package manager, like apt-get, yum, etc.
  • If you are installing on Windows, you can also install the package with the option to install pip, which is a package manager for python, allowing you to install and manage python packages easily.

I hope this is helpful in guiding you through the process of installing Python 3 on your system. The next part will talk about the syntax and structure of Python programming.

Part 3. [Basic syntax and structure of a Python program]

[Python Syntax]

The syntax of Python is very straightforward and easy to learn. Python uses whitespace to define blocks of code, unlike other programming languages that use curly braces. For example, when defining a function in Python, you would use the def keyword, followed by the function name, and a colon. The code inside the function is indented by four spaces.

[Basic Structure of a Python Program]

A Python program typically consists of one or more modules, each of which contains one or more statements. A module is a file containing Python definitions and statements.

A statement is an instruction that tells the Python interpreter to perform a specific action. For example, you can use the print statement to display text on the screen, or the assignment statement to assign a value to a variable.

[Variables]

Variables are used to store data in a Python program. In Python, you don’t have to declare the type of a variable, as the type is determined dynamically at runtime. For example, to assign a value to a variable, you would use the assignment operator (=), followed by the value you want to assign.

[Functions]

Functions are blocks of code that perform a specific task. In Python, you can define your own functions, or use the built-in functions provided by the language. For example, the print function is a built-in function that allows you to display text on the screen.

Part 4. [Demonstration of running a simple program in the development environment]

Introduction: Hi there, in this video, we’re going to dive into the basic steps of running a simple program in a Python development environment. Whether you’re new to programming or just new to Python, we’ll cover everything you need to know to get started.

Step 1:

Setting up the development environment Before we can run a program, we need to have a development environment in place. There are many options for this, including integrated development environments (IDEs) like PyCharm or Visual Studio Code, or a simple text editor like Notepad++ or Sublime Text. For this demonstration, we’ll be using IDLE, which is included with the Python installation.

Step 2:

Creating a new Python file Open the IDLE environment and select “File” > “New File”. This will open a new text editor window where we can write our Python code.

Step 3:

Writing a simple program Now, let’s write a simple program that prints “Hello, World!” to the console. Type the following code into the text editor:

print("Hello, World!")

Step 4:

Saving the program Next, we need to save the program to a file. Select “File” > “Save As” and choose a location for the file. Give the file a name, making sure it ends with .py, and click “Save”.

Step 5:

Running the program With our program saved, we’re now ready to run it. To do this, select “Run” > “Run Module” from the IDLE menu. The program will run, and the output “Hello, World!” will be displayed in the IDLE console.

That’s it! You’ve just run your first Python program. Congratulations! Remember, this is just the beginning. With the basics of running a program under your belt, you’re ready to dive into more complex programs and explore all that Python has to offer

[Conclusion]

In the next video, In this video, we’ve covered the basic syntax and structure of a Python program. We learned about variables, functions, and the structure of a Python program. Good luck, and happy coding!

Thank you for watching, and I will see you in the next video.

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