Python & Jupyter Setup on Windows (2026 Edition) 🚀

Zero to your first data analysis in about 15 minutes. No detours, no mystery errors.

🧰 My Setup

Layer	Choice
Operating System	Windows
Python	v3.12+
Code Editor	Visual Studio Code (VS Code)
Interactive Environment	Jupyter Notebook

1️⃣ Install Python

1. Go to python.org/downloads/windows.
2. Download the latest Windows installer (.exe, 64-bit).
3. Run the installer.
4. ⚠️ Important: tick "Add python.exe to PATH" at the bottom of the window. Skipping this causes about 80% of beginner setup pain.
5. Click Install Now.
6. Wait for the progress bar, then click Close.

Verify it worked (Command Prompt or PowerShell):

python --version
pip --version

Both should print version numbers. If Windows says "not recognized", reinstall and check the PATH box.

2️⃣ Your First Python Script

1. Open VS Code (or Notepad++).

2. Paste this:

   # Simple Python program for quick data summary
   data = [120, 250, 310, 180, 400]
   average_sales = sum(data) / len(data)
   
   print("Hello, Data World!")
   print(f"Average Sales: {average_sales}")

3. Save as sales_summary.py (snake_case.py, see naming conventions).

4. Open a terminal, cd to the folder containing the file.

5. Run:

   python sales_summary.py

Expected output:

Hello, Data World!
Average Sales: 252.0

3️⃣ Data Analysis in Jupyter Notebook

💡 Pro tip: do this inside a virtual environment. Full guide: notes-virtual-env.md.

1. Install the stack:

   pip install jupyter pandas numpy matplotlib seaborn

2. cd to your project folder.

3. Launch:

   jupyter notebook

4. In the browser: New → Python 3 (ipykernel).

5. Rename it with snake_case.ipynb, e.g. exploratory_data_analysis.ipynb.

6. In the first cell:

   import pandas as pd
   
   df = pd.DataFrame({
       "Product": ["Laptop", "Mouse", "Keyboard"],
       "Sales": [55000, 1200, 2500]
   })
   df.head()

7. Press Shift + Enter to run it. Your first DataFrame is alive. 🎉

🖥️ Bonus: Notebooks Inside VS Code

1. Install the Python and Jupyter extensions.
2. Create or open a .ipynb file.
3. Click Select Kernel (top right) and choose your project's Python or venv.

You get notebooks, terminal, and Git in one window.

🧯 Common Snags

Problem	Fix
python is not recognized	Reinstall Python with the PATH box ticked
pip is not recognized	Try python -m pip --version
jupyter is not recognized	Activate your venv, or run python -m notebook
ModuleNotFoundError	You're in the wrong environment; activate the right one and pip install again

 

First Published Date: Aug 24, 2026 
Last Updated Date: Sep 30, 2026