如何使用Python将PDF/HTML网页链接转换为PDF文档？

Depending on whether your link points directly to a PDF file or to an HTML page, the approach varies a bit. Let's break down both cases with practical examples:

1. Converting a direct PDF link (like https://mylink.pdf) #

This is straightforward—you're essentially downloading the existing PDF file. The requests library is perfect for this task:

First, install requests if you haven't already:

pip install requests

Then use this code snippet:

import requests

pdf_url = "https://mylink.pdf"
output_file = "downloaded_pdf.pdf"

try:
    # Fetch the PDF content
    response = requests.get(pdf_url)
    response.raise_for_status()  # Catch any HTTP errors (like 404, 500)
    
    # Save the content to a local file
    with open(output_file, "wb") as f:
        f.write(response.content)
    
    print(f"PDF saved successfully to {output_file}")
except Exception as e:
    print(f"Oops, something went wrong: {e}")

2. Converting an HTML page to PDF (like https://www.mylink.htm) #

For turning HTML pages into PDFs, you'll need a library that can render HTML and generate a PDF file. Two popular, reliable options are pdfkit and weasyprint.

Option A: Using pdfkit #

This library uses wkhtmltopdf (a command-line tool) under the hood to render HTML. Here's how to use it:

1. Install the library:

pip install pdfkit

2. Install wkhtmltopdf on your system:

   • Windows: Download it from the official source and add it to your system PATH.
   • macOS: Use Homebrew: brew install wkhtmltopdf
   • Linux: Use your package manager, e.g., sudo apt-get install wkhtmltopdf

3. Run the conversion code:

import pdfkit

html_url = "https://www.mylink.htm"
output_file = "html_converted.pdf"

# Basic conversion
pdfkit.from_url(html_url, output_file)

# If wkhtmltopdf isn't in your PATH, specify its location explicitly:
# config = pdfkit.configuration(wkhtmltopdf=r"C:\path\to\wkhtmltopdf.exe")
# pdfkit.from_url(html_url, output_file, configuration=config)

print(f"HTML page converted to PDF at {output_file}")

Option B: Using weasyprint #

This is a pure-Python alternative, so no external command-line tools are required. It's great if you want a self-contained solution:

1. Install the library:

pip install weasyprint

2. Convert the HTML page:

from weasyprint import HTML

html_url = "https://www.mylink.htm"
output_file = "weasyprint_output.pdf"

HTML(url=html_url).write_pdf(output_file)

print(f"PDF generated successfully at {output_file}")

Both libraries let you customize the output (like page size, margins, custom CSS) if you need more control—just check their official docs for advanced options!

内容的提问来源于stack exchange，提问作者Shashi Shankar Singh