定义一个基于reportlab的类来生成pdf文件

以下是一个基于reportlab的示例类，用于生成PDF文件：

from reportlab.lib.pagesizes import letter
from reportlab.lib.units import inch
from reportlab.pdfgen import canvas

class PDFGenerator:
    def __init__(self, filename):
        self.filename = filename

    def generate(self, text):
        # Create the PDF object, using the specified filename
        c = canvas.Canvas(self.filename, pagesize=letter)

        # Set the font and size
        c.setFont("Helvetica", 12)

        # Draw a string at the specified coordinates
        textobject = c.beginText()
        textobject.setTextOrigin(inch, 11*inch)
        for line in text.split('\n'):
            textobject.textLine(line)
        c.drawText(textobject)

        # Save the PDF
        c.save()

使用示例：

pdf = PDFGenerator("example.pdf")
text = "Hello, World!\nThis is an example PDF file generated using reportlab."
pdf.generate(text)

这将生成一个名为“example.pdf”的PDF文件，其中包含给定文本字符串。