简单旅游网站开发,建立网站的三种方式,kloxo网站压缩,国内网页设计师个人网站Python提供了众多的PDF支持库#xff0c;本文是在Python3环境下#xff0c;试用了两个库来完成PDF的生成的功能。PyPDF对于读取PDF支持较好#xff0c;但是没找到生成多层PDF的方法。Reportlab看起来更成熟#xff0c;能够利用Canvas很方便的生成多层PDF#xff0c;这样就…Python提供了众多的PDF支持库本文是在Python3环境下试用了两个库来完成PDF的生成的功能。PyPDF对于读取PDF支持较好但是没找到生成多层PDF的方法。Reportlab看起来更成熟能够利用Canvas很方便的生成多层PDF这样就能够实现图片扫描上来的内容也可以进行内容搜索的目标。Reportlab生成双层PDF双层PDF应用PDF中的Canvas概念先画文字最后将图片画上去这样就是两层的PDF。import os# import urllib2import timefrom reportlab import platypusfrom reportlab.lib.pagesizes import letterfrom reportlab.lib.units import inchfrom reportlab.platypus import SimpleDocTemplate, Imagefrom reportlab.pdfgen import canvasimage_file ./42.png# Use Canvas to generate pdfc canvas.Canvas(reportlab_canvas.pdf, pagesizeletter)width, height letterc.setFillColorRGB(0,0.77,0.77)# say hello (note after rotate the y coord needs to be negative!)c.drawString( 3*inch, 3*inch, Hello World)c.drawImage(image_file, 0 , 0)c.showPage()c.save()PyPDF2读取PDFfrom PyPDF2 import PdfFileWriter, PdfFileReaderoutput PdfFileWriter()input1 PdfFileReader(open(jquery.pdf, rb))# print document infoprint(input1.getDocumentInfo())# print how many pages input1 has:print (pdf_document.pdf has %d pages. % input1.getNumPages())# print page contentpage_content input1.getPage(0).extractText()print( page_content )# add page 1 from input1 to output document, unchangedoutput.addPage(input1.getPage(0))# add page 2 from input1, but rotated clockwise 90 degreesoutput.addPage(input1.getPage(1).rotateClockwise(90))# finally, write output to document-output.pdfoutputStream open(PyPDF2-output.pdf, wb)output.write(outputStream)但是PyPDF获取PDF内容有很多问题可以看这个问题列表。文档中也有说明。| extractText(self) | ## | # Locate all text drawing commands, in the order they are provided in the | # content stream, and extract the text. This works well for some PDF | # files, but poorly for others, depending on the generator used. This will | # be refined in the future. Do not rely on the order of text coming out of | # this function, as it will change if this function is made more | # sophisticated. | #| # Stability: Added in v1.7, will exist for all future v1.x releases. May | # be overhauled to provide more ordered text in the future. | # return a unicode string object以上就是本文的全部内容希望对大家的学习有所帮助也希望大家多多支持我们。时间 2017-04-21
