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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 VirtualEnv
A Virtual Environment in Python is a self-contained directory that contains a Python installation for a specific project. It keeps dependencies isolated from your global Python setup.
🔹 Why Use a Virtual Environment?
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Prevents dependency conflicts between projects
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Keeps your project environment clean and manageable
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Lets you use different versions of packages for different projects
🔹 Create a Virtual Environment
Use the built-in venv module:
python -m venv myenv
✅ This will create a folder named myenv with the virtual environment inside it.
🔹 Activate the Virtual Environment
On Windows:
myenv\Scripts\activate
On macOS/Linux:
source myenv/bin/activate
✅ Once activated, your terminal will show the environment name like:(myenv) C:\Users\...>
🔹 Install Packages Inside VirtualEnv
Now that you're inside the virtual environment, use pip as usual:
pip install flask
The installed packages stay isolated from your system Python.
🔹 Deactivate the Virtual Environment
When you're done:
deactivate
✅ You’ll exit the virtual environment and return to your global Python path.
🔹 Delete a Virtual Environment
Just delete the folder:
rm -r myenv
🔹 Check Installed Packages in VirtualEnv
pip list
You’ll only see packages installed within that environment.
Practice Questions
Q1. Write a Python command to create a virtual environment called projectenv.
Q2. Write a command to activate the virtual environment on Windows.
Q3. Write a command to install the django package inside the virtual environment.
Q4. Write a command to list all installed packages inside the virtual environment.
Q5. Write a command to deactivate the virtual environment.
Q6. Write a command to create a requirements.txt file using pip freeze.
Q7. Write a command to install dependencies from requirements.txt inside a virtual environment.
Q8. Write a command to delete a virtual environment folder named projectenv.
Q9. Write a short explanation or command to use a virtual environment to avoid package conflicts.
Q10. Write steps to use different versions of the same package in two separate virtual environments.
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
