如何使用Python将网页转换为PDF

Question

我正在寻找使用Python将网页打印为本地文件PDF的解决方案。很好的解决方案之一是使用Qt，请参见https://bharatikunal.wordpress.com/2010/01/。

由于我在安装PyQt4时遇到问题，因此一开始它不起作用，因为它给出了错误消息，例如“ ImportError: No module named PyQt4.QtCore”和“ ImportError: No module named PyQt4.QtCore”。

这是因为PyQt4没有正确安装。我以前的库位于C：\ Python27 \ Lib，但是它不适用于PyQt4。

实际上，它只需要从http://www.riverbankcomputing.com/software/pyqt/download下载（注意所使用的正确Python版本），然后将其安装到C：\
Python27（我的情况）。而已。

现在脚本运行良好，所以我想分享一下。有关使用Qprinter的更多选项，请参考http://qt-
project.org/doc/qt-4.8/qprinter.html#Orientation-enum
。

Answer 1

感谢下面的帖子，无论页面有多少页，我都可以添加要打印的网页链接地址并在生成的PDF上显示时间。

使用Python将文本添加到现有PDF

https://github.com/disflux/django-
mtr/blob/master/pdfgen/doc_overlay.py

要共享脚本，如下所示：

import time
from pyPdf import PdfFileWriter, PdfFileReader
import StringIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
from xhtml2pdf import pisa
import sys 
from PyQt4.QtCore import *
from PyQt4.QtGui import * 
from PyQt4.QtWebKit import *

url = 'http://www.yahoo.com'
tem_pdf = "c:\\tem_pdf.pdf"
final_file = "c:\\younameit.pdf"

app = QApplication(sys.argv)
web = QWebView()
#Read the URL given
web.load(QUrl(url))
printer = QPrinter()
#setting format
printer.setPageSize(QPrinter.A4)
printer.setOrientation(QPrinter.Landscape)
printer.setOutputFormat(QPrinter.PdfFormat)
#export file as c:\tem_pdf.pdf
printer.setOutputFileName(tem_pdf)

def convertIt():
    web.print_(printer)
    QApplication.exit()

QObject.connect(web, SIGNAL("loadFinished(bool)"), convertIt)

app.exec_()
sys.exit

# Below is to add on the weblink as text and present date&time on PDF generated

outputPDF = PdfFileWriter()
packet = StringIO.StringIO()
# create a new PDF with Reportlab
can = canvas.Canvas(packet, pagesize=letter)
can.setFont("Helvetica", 9)
# Writting the new line
oknow = time.strftime("%a, %d %b %Y %H:%M")
can.drawString(5, 2, url)
can.drawString(605, 2, oknow)
can.save()

#move to the beginning of the StringIO buffer
packet.seek(0)
new_pdf = PdfFileReader(packet)
# read your existing PDF
existing_pdf = PdfFileReader(file(tem_pdf, "rb"))
pages = existing_pdf.getNumPages()
output = PdfFileWriter()
# add the "watermark" (which is the new pdf) on the existing page
for x in range(0,pages):
    page = existing_pdf.getPage(x)
    page.mergePage(new_pdf.getPage(0))
    output.addPage(page)
# finally, write "output" to a real file
outputStream = file(final_file, "wb")
output.write(outputStream)
outputStream.close()

print final_file, 'is ready.'