# Python ReportLab Module

ReportLab is the standard library for generating PDFs in Python. It allows you to create complex documents with custom layouts, graphics, and charts directly from code.

## Installation

```bash
pip install reportlab
```

## Basic Usage

The `canvas` object is the primary interface for generating PDFs.

```python
from reportlab.pdfgen import canvas

def hello(c):
    c.drawString(100, 750, "Hello World")

c = canvas.Canvas("hello.pdf")
hello(c)
c.showPage()
c.save()
```

## Coordinate System

ReportLab uses a coordinate system where (0,0) is at the bottom-left corner of the page. The default unit is points (1/72 inch).

## Drawing Shapes

```python
from reportlab.lib.pagesizes import letter
from reportlab.pdfgen import canvas

c = canvas.Canvas("shapes.pdf", pagesize=letter)

# Draw a line
c.line(100, 700, 500, 700)

# Draw a rectangle (x, y, width, height, fill=0/1)
c.rect(100, 600, 200, 50, fill=1)

# Draw a circle
c.circle(300, 500, 30, fill=1)

c.save()
```

## Platypus (High-Level Layout)

For complex documents, use PLATYPUS (Page Layout and Typography Using Scripts). It handles page breaks and flow automatically.

```python
from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer
from reportlab.lib.styles import getSampleStyleSheet

doc = SimpleDocTemplate("complex.pdf")
styles = getSampleStyleSheet()
story = []

story.append(Paragraph("This is a Title", styles["Title"]))
story.append(Spacer(1, 12))
story.append(Paragraph("This is a normal paragraph that will wrap automatically.", styles["Normal"]))

doc.build(story)
```

[[programming/python/python]]