Report generation (notebooks to HTML/PDF) in Data Analysis Python - Step-by-Step Execution

Concept Flow - Report generation (notebooks to HTML/PDF)

Write notebook code

↓

Run notebook cells

↓

Export notebook

↓

To HTML

↓

To PDF

↓

View or share report

You write and run code in a notebook, then export it as HTML or PDF to create a shareable report.

Execution Sample

Data Analysis Python

import nbformat
from nbconvert import HTMLExporter

with open('analysis.ipynb') as f:
    nb = nbformat.read(f, as_version=4)
html_exporter = HTMLExporter()
(body, resources) = html_exporter.from_notebook_node(nb)
with open('report.html', 'w') as f:
    f.write(body)

This code reads a notebook file and converts it to an HTML report file.

Execution Table

Step	Action	Input	Output	Notes
1	Read notebook file	'analysis.ipynb'	Notebook object	Loads notebook content into memory
2	Create HTML exporter	None	HTMLExporter instance	Prepares exporter for HTML format
3	Convert notebook to HTML	Notebook object	HTML string, resources	Transforms notebook cells to HTML
4	Write HTML to file	HTML string	'report.html' file	Saves the HTML report to disk
5	Open 'report.html'	File	Rendered report in browser	User views the report
6	Export to PDF (optional)	Notebook or HTML	PDF file	Alternative report format
7	Share report	HTML or PDF file	Shared report	Send or publish report
Exit	Process complete	Report file created	Report ready	End of report generation

💡 Report file created and ready for viewing or sharing

Variable Tracker

Variable	Start	After Step 1	After Step 3	After Step 4	Final
nb	None	Notebook object loaded	Same notebook object	Same notebook object	Same notebook object
html_exporter	None	None	HTMLExporter instance	HTMLExporter instance	HTMLExporter instance
body	None	None	HTML string	HTML string	HTML string
resources	None	None	Resources dict	Resources dict	Resources dict

Key Moments - 3 Insights

Why do we need to read the notebook file before exporting?

The notebook file contains the code and outputs. Reading it loads this content into memory so the exporter can convert it, as shown in Step 1 and Step 3 of the execution table.

Can we export directly to PDF from the notebook object?

Yes, but often the notebook is first converted to HTML or another format, then to PDF. Step 6 shows PDF export as an optional step after HTML export.

What happens if we don't write the HTML string to a file?

The report won't be saved and can't be viewed later. Step 4 writes the HTML string to 'report.html' so it can be opened and shared.

Visual Quiz - 3 Questions

Look at the execution table, what is the output after Step 3?

A HTML string and resources

B Notebook object

C HTMLExporter instance

D Report file

💡 Hint

Check the 'Output' column for Step 3 in the execution table.

At which step is the HTML report saved to disk?

A Step 2

B Step 3

C Step 4

D Step 5

💡 Hint

Look for the action 'Write HTML to file' in the execution table.

If we skip Step 1, what will happen in Step 3?

A HTMLExporter will create a notebook object automatically

B Conversion will fail due to missing notebook object

C An empty HTML file will be created

D The report will be saved as PDF instead

💡 Hint

Step 1 loads the notebook; without it, Step 3 has no input to convert.

Concept Snapshot

Report generation from notebooks:
- Load notebook file with nbformat
- Use nbconvert exporters (HTMLExporter, PDFExporter)
- Convert notebook object to desired format
- Save output to file
- Share or view report
Key: Reading notebook first, then exporting

Full Transcript

Report generation from notebooks involves reading the notebook file into memory, then using exporters like HTMLExporter to convert the notebook content into HTML or PDF formats. The process starts by loading the notebook file, then creating an exporter instance. Next, the notebook is converted to the target format, producing a string or file content. This output is saved to a file, such as 'report.html', which can be opened in a browser or shared. Optionally, the report can be exported as PDF. Each step depends on the previous, so skipping reading the notebook will cause conversion to fail. This step-by-step process ensures the notebook's code, outputs, and markdown are preserved in a shareable report.