Day 15 Basics of Python for DevOps Engineers

1. What is Python?

• Overview:

  • Python is an open-source, general-purpose, high-level, and object-oriented programming language.

  • It was created by Guido van Rossum and is known for its readability and simplicity.

  • Python has a rich ecosystem with vast libraries and frameworks, including:

    • Django - A high-level web framework.

    • Flask - A lightweight web framework.

    • TensorFlow - A library for machine learning.

    • Pandas - A data manipulation and analysis library.

    • Keras - A deep learning API.

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2. How to Install Python?

Installation Instructions:

• Windows:

  1. Go to the official Python website.

  2. Download the installer for your version.

  3. Run the installer and ensure you check the box that says "Add Python to PATH."

  4. Follow the installation steps.

• Ubuntu: Open the terminal and run:

    sudo apt-get update
    sudo apt-get install python3
  

• macOS:

  1. Open the terminal.

  2. You can use Homebrew to install Python:

    brew install python

• CentOS: Open the terminal and run:

    sudo yum install python3
  

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3. Checking the Python Version

After installation, you can check the installed version of Python by running the following command in your terminal (or command prompt):

python3 --version

or

python --version

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4. Read About Different Data Types in Python

In Python, the primary built-in data types include:

• Numeric Types:

  • int: Integer numbers, e.g., 5, -3.

  • float: Floating-point numbers (decimals), e.g., 3.14, -0.001.

  • complex: Complex numbers, e.g., 2 + 3j.

• Sequence Types:

  • str: String (text), e.g., "Hello, World!".

  • list: Ordered, mutable collections of items, e.g., [1, 2, 3, "Python"].

  • tuple: Ordered, immutable collections of items, e.g., (1, 2, 3).

• Mapping Type:

  • dict: Unordered collections of key-value pairs, e.g., {"name": "Alice", "age": 25}.

• Set Types:

  • set: Unordered collections of unique items, e.g., {1, 2, 3}.

  • frozenset: Immutable sets.

• Boolean Type:

  • bool: Represents True or False.

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Tasks

Task 1: Install Python and Check Version

• Follow the installation steps for your respective operating system.

• Run the command to check the version of Python installed.

Task 2: Explore Data Types

• Research each data type mentioned above and create examples in your Python environment.

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Example Code Snippet:

You can also try out the following code snippet to see Python's data types in action:

# Numeric Types
a = 10          # int
b = 3.14       # float
c = 1 + 2j     # complex

# Sequence Types
my_string = "Hello, Python!"  # str
my_list = [1, 2, 3, "Hello"]   # list
my_tuple = (1, 2, 3)           # tuple

# Mapping Type
my_dict = {"name": "Fauzeya", "age": 25}  # dict

# Set Types
my_set = {1, 2, 3}  # set
my_frozenset = frozenset([1, 2, 3])  # frozenset

# Boolean Type
is_python_fun = True  # bool

# Print data types
print(type(a), type(b), type(c))
print(type(my_string), type(my_list), type(my_tuple))
print(type(my_dict))
print(type(my_set), type(my_frozenset))
print(type(is_python_fun))

This code will print the data types of each variable, giving you a practical understanding of how they work in Python.