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Hajipur, Bihar, 844101
Python
Introduction to Python
Python Basics
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Python Syntax
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Python Comments
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Python Variables
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Python Data Types
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Python Casting
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Python I/O
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Python Operators
Cotrol Structures
Data Structures
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Python Strings
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Python Lists
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Python Tuples
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Python Dictionaries
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Python Sets
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Python Arrays
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Python Bytes and Bytearray
Date and Time
Functions and Module
File Handling
Python OOP
Advanced Concepts
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Python Scope
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Python Modules
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Python JSON
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Python RegEx
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Python PIP
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Python Try...Except
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Python String Formatting
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Python User Input
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Python VirtualEnv
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Python Math
Python DSA
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Python DSA
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Lists and Arrays
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Python Stacks
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Python Queues
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Linked Lists
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Python Hash Tables
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Python Trees
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Python Binary Trees
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Binary Search Trees
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Python AVL Trees
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Python Graphs
Searching Algorithms
Sorting Algorithms
Python Install
🛠️ Python Installation
🔍 Step 1: Check If Python Is Already Installed
Before installing Python, check whether it is already installed on your system.
✅ Windows
Open Command Prompt and type:
python --version
If installed, you will see something like:
Python 3.11.2
If not installed, it may show an error like 'python' is not recognized as an internal or external command.
✅ macOS / Linux
Open the Terminal and type the same command:
python3 --version
If Python 3 is installed, it will show the version.
🧰 Step 2: Download Python
Visit the official Python download page:
👉 https://www.python.org/downloads/
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The site will automatically detect your operating system.
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Click the Download Python 3.x.x button.
💾 Step 3: Install Python on Windows
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Run the downloaded
.exefile. -
IMPORTANT: ✅ Check the box that says "Add Python to PATH" (This allows you to use Python from any folder).
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Click "Install Now".
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Wait for the setup to complete.
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Click "Close" once done.
To verify, open Command Prompt and run:
python --version
🍎 Step 3: Install Python on macOS
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Download the
.pkginstaller from the official website. -
Open it and follow the default installation steps.
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After installation, open Terminal and type:
python3 --version
If you see a version like Python 3.12.0, it’s installed correctly.
🐧 Step 3: Install Python on Linux
Most Linux distributions come with Python pre-installed. But to install the latest version:
sudo apt update
sudo apt install python3
Check the installation:
python3 --version
⚙️ Step 4: Verify Python and pip Installation
After installing Python, you also get pip (Python’s package manager).
Check Python:
python --version # or python3 --version
Check pip:
pip --version # or pip3 --version
Output should be like:
pip 23.0.1 from ... (python 3.11)
🧪 Step 5: Write Your First Python Program
Now let's test Python by writing a simple program.
🖥️ Using Command Line:
python
Then type:
print("Hello, Python!")
Output:
Hello, Python!
To exit, type:
exit()
📝 Using a File:
Create a file named hello.py with the following code:
print("Hello from a Python file!")
Run it:
python hello.py
🆘 Troubleshooting Tips
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If
pythondoesn’t work, trypython3. -
Make sure “Add Python to PATH” was checked during Windows installation.
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Use
where python(Windows) orwhich python3(macOS/Linux) to locate Python.
✅ Summary
| Platform | Command to Run Python | Check Version |
|---|---|---|
| Windows | python |
python --version |
| macOS | python3 |
python3 --version |
| Linux | python3 |
python3 --version |
Practice Questions
Q1. Print your name:
Expected: My name is CodePractice
Q2. Add two numbers and display:
Output: Sum: 15
Q3. Display installation success message:
Output: Python installed successfully!
Q4. Show today’s date using datetime:
Output: Today’s date is: YYYY‑MM‑DD
Q5. Print three lines:
Welcome to Python
# Let's start coding
# Happy Learning!
Python
Introduction to Python
Python Basics
-
Python Syntax
-
Python Comments
-
Python Variables
-
Python Data Types
-
Python Casting
-
Python I/O
-
Python Operators
Cotrol Structures
Data Structures
-
Python Strings
-
Python Lists
-
Python Tuples
-
Python Dictionaries
-
Python Sets
-
Python Arrays
-
Python Bytes and Bytearray
Date and Time
Functions and Module
File Handling
Python OOP
Advanced Concepts
-
Python Scope
-
Python Modules
-
Python JSON
-
Python RegEx
-
Python PIP
-
Python Try...Except
-
Python String Formatting
-
Python User Input
-
Python VirtualEnv
-
Python Math
Python DSA
-
Python DSA
-
Lists and Arrays
-
Python Stacks
-
Python Queues
-
Linked Lists
-
Python Hash Tables
-
Python Trees
-
Python Binary Trees
-
Binary Search Trees
-
Python AVL Trees
-
Python Graphs
Searching Algorithms
Sorting Algorithms
