fast-office 0.1.2

Schema-driven Office document generation

Fast Office

A schema-driven Python package for generating Microsoft Office documents programmatically.

fast-office provides a structured and strongly-typed API for creating:

• Microsoft Word documents (.docx)
• Microsoft PowerPoint presentations (.pptx)
• Microsoft Excel workbooks (.xlsx)

The package is designed for applications that need reliable document generation at scale, including:

• AI document generation systems
• Automated reporting pipelines
• SaaS reporting platforms
• Workflow automation systems
• Data export engines

fast-office abstracts document creation into clean Python specifications using typed models powered by Pydantic.

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Built on

fast-office leverages:

• python-docx
• python-pptx
• openpyxl
• lxml

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Installation

Using pip

pip install fast-office

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Using uv

uv add fast-office

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Core Concepts

Specifications

Each document type uses a specification model.

Examples:

• DocxSpec
• PptxSpec
• WorkbookSpec

These specs define:

• Content
• Layout
• Styling
• Metadata
• Formatting

The generator then convert the specification into an Office document.

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DOCX Example

Create a Word Document

from fast_office.documents.docx import DocxGenerator
from fast_office.types.docx import (
    DocxHeading,
    DocxParagraph,
    DocxSection,
    DocxSpec,
)

spec = DocxSpec(
    title="Quarterly Report",
    author="Finance Team",
    font_name="Calibri",
    font_size=11,
    sections=[
        DocxSection(
            elements=[
                DocxHeading(
                    text="Executive Summary",
                    level=1,
                ),
                DocxParagraph(
                    text="Revenue increased by 18% year-over-year."
                ),
            ]
        )
    ]
)

generator = DocxGenerator(spec)
path = generator.generate()

print(path)

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DOCX Features

Paragraphs

Supports:

• Alignment
• Styling
• Custom fonts
• Colors
• Rich formatting

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Tables

Generate structured tables with:

• Headers
• Cell formatting
• Borders
• Alignment
• Width controls

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Images

Insert:

• Local images
• Positioned images
• Resized images

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Headers & Footers

Configure:

• Header text
• Footer text
• Dynamic page numbers

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PPTX Example

Create a PowerPoint Presentation

from fast_office.documents.pptx import PptxGenerator
from fast_office.types.pptx import (
    PptxSlide,
    PptxSpec,
)

spec = PptxSpec(
    title="Startup Pitch Deck",
    slides=[
        PptxSlide(
            title="Problem",
            body="SMEs struggle with financial visibility.",
            speaker_notes="Focus on market pain points."
        ),
        PptxSlide(
            title="Solution",
            bullet_points=[
                "Automated reporting",
                "AI financial insights",
                "Real-time dashboards",
            ]
        ),
    ]
)

generator = PptxGenerator(spec)
path = generator.generate()

print(path)

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PPTX Features

Slide Layouts

Supports multiple slide layouts including:

• Title slides
• Title + content
• Blank slides
• Custom positioned layouts

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Speaker Notes

Attach notes for presenters directly to slides.

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Charts

Generate chart-based slides using structured chart data.

Supported chart types include:

• Bar charts
• Column charts
• Pie charts
• Line charts

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Custom Elements

Add positioned:

• Text blocks
• Shapes
• Images
• Charts

using coordinate-based placement.

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XLSX Example

Create an Excel Workbook

from fast_office.documents.workbook import WorkbookGenerator
from fast_office.types.workbook import (
    WorkbookSpec,
    WorksheetSpec,
)

spec = WorkbookSpec(
    sheets=[
        WorksheetSpec(
            title="Revenue",
            cells={
                "A1": "Month",
                "B1": "Revenue",
                "A2": "January",
                "B2": 120000,
                "A3": "February",
                "B3": 148000,
            }
        )
    ]
)

generator = WorkbookGenerator(spec)
path = generator.generate()

print(path)

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Advanced XLSX Features

Conditional Formatting

Supports:

• Color scales
• Data bars
• Formula rules
• Threshold-based highlighting

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Data Validation

Add spreadsheet validation such as:

• Dropdown lists
• Numeric ranges
• Date restrictions
• Formula validations

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Charts

Generate embedded Excel charts from worksheet data.

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Worksheet Protection

Protect:

• Worksheets
• Cells
• Workbook structures

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Named Ranges

Create reusable named ranges for:

• Formulas
• Reporting
• Financial models

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AI & Automation Use Cases

fast-office is especially useful for AI-native systems.

Example Use Cases

Financial Report Generation

Generate:

• Investment memos
• Financial statements
• Business valuation models
• KPI dashboards

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Pitch Deck Automation

Automatically create:

• Startup decks
• Investor teasers
• Sales presentations
• Strategic reports

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AI Agents

Integrate into:

• LangGraph agents
• Workflow orchestration systems
• Multi-agent pipelines
• LLM document workflows

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Enterprise Reporting

Generate:

• Weekly reports
• Board reports
• Operational summaries
• Compliance documents

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Architecture Overview

User Input
     ↓
Pydantic Specifications
     ↓
Document Generators
     ↓
Underlying Office Engines
     ↓
Generated Office Files

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Design Philosophy

1. Declarative APIs

Documents should be described, not manually assembled.

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2. Strong Validation

Invalid document structures should fail early.

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3. Extensibility

The architecture supports future additions such as:

• PDF generation
• HTML export
• Template engines
• Theme systems
• Dynamic layouts

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4. AI Compatibility

The specification-based design makes the package ideal for:

• Structured outputs
• Tool calling
• LLM pipelines
• Agentic workflows

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Supported Python Versions

• Python 3.12+

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Dependencies

Core dependencies include:

• python-docx
• python-pptx
• openpyxl
• pydantic
• lxml

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Roadmap

Potential future features:

• Template rendering engine
• HTML → DOCX conversion
• PDF export
• Markdown support
• Theme packs
• Dynamic table generation
• Advanced charting
• OpenXML-level editing
• Streaming document generation
• Cloud storage integrations

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Contributing

Contributions are welcome.

Areas that can benefit from contribution include:

• Additional document components
• New chart types
• Template systems
• Performance optimizations
• Improved typing
• Documentation
• Testing coverage

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Example Applications

Automated Financial Reports

report = build_financial_report(data)
path = report.generate()

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AI Generated Pitch Decks

deck = build_pitch_deck(startup_data)
path = deck.generate()

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Spreadsheet Exports

workbook = build_workbook(dataset)
path = workbook.generate()

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License

MIT License

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Summary

fast-office provides a structured, and extensible way to generate Office documents programmatically.

It abstracts away low-level Office APIs while maintaining flexibility, strong typing, and compatibility with automation systems.

Whether you are building:

• AI agents
• Reporting systems
• SaaS products
• Financial tooling
• Enterprise automation

fast-office offers a clean foundation for scalable document generation.