[Office PDF] PDF merging and splitting will free us from the functional limitations of paid software, OK

Good tools , You can do more with less , Study together today Pdf Combination and separation

Tool module PyPDF2
Analytic hierarchy process — File path and file reading and saving
Read into folder ：
data\in
Read in file name :temp.pdf
Save the folder ：
data\out
Save the file ,1.pdf,2.pdf,3.pdf…
Merge files ：
431.pdf

Analytic hierarchy process — Take every page out of the file

    pdf_writer = PdfFileWriter()
    page = pdfReader.getPage(page_no)
    pdf_writer.addPage(page)

Analytic hierarchy process — Take every page out of the file
Construct path information including path and file name of each page

    file ='{0}.pdf'.format(page_no + 1)
    outfile = os.path.join(outdir,file)

Analytic hierarchy process — Create path information to hard disk , At the same time call pdf_writer Saved page information in , Write to the specified outfile Location
notes ：output_pdf Yes receive from pdf_writer Of writing information .

    with open(outfile,'wb') as output_pdf:
        pdf_writer.write(output_pdf)
    print(' Split and write the file ')

Analytic hierarchy process — Rebuild write variables pdf_wrigter, Specify sequence number as 3,0,2 Page added to pdf_writer in （ Merge ）

    pdf_writer = PdfFileWriter()
    pdf_writer.addPage(pdfReader.getPage(3))
    pdf_writer.addPage(pdfReader.getPage(0))
    pdf_writer.addPage(pdfReader.getPage(2))

Analytic hierarchy process — Re create file name , route , Complete file information , adopt with open（） Write to hard disk , Finish writing after merging

    file = '431.pdf'
    outfile = os.path.join(outdir,file)
    with open(outfile,'wb') as output_pdf:
        pdf_writer.write(output_pdf)
        print(' Select the page you want to merge ')

The following is the complete code

# coding = utf-8
from PyPDF2 import *
import os
indir = r'data\in'
outdir = r'data\out'
infile = os.path.join(indir,'temp.pdf') # Read file path 
pdfReader = PdfFileReader(infile)

for page_no in range(pdfReader.numPages):
    pdf_writer = PdfFileWriter()
    page = pdfReader.getPage(page_no)
    pdf_writer.addPage(page)

    file ='{0}.pdf'.format(page_no + 1)
    outfile = os.path.join(outdir,file)
    
    with open(outfile,'wb') as output_pdf:
        pdf_writer.write(output_pdf)
    print(' Split complete ')
    
    pdf_writer = PdfFileWriter()
    pdf_writer.addPage(pdfReader.getPage(3))
    pdf_writer.addPage(pdfReader.getPage(0))
    pdf_writer.addPage(pdfReader.getPage(2))

    file = '431.pdf'
    outfile = os.path.join(outdir,file)
    with open(outfile,'wb') as output_pdf:
        pdf_writer.write(output_pdf)
        print(' Select the page you want to merge ')

Journal entry ：

1. Code segment writing , analysis , The purpose is to facilitate readers to read and understand the connotation of each small piece of code
2. By parsing these small pieces of code , Let us understand the logic of the code
3. Through the analysis before and after, let us know python The code is still easy to understand , Easy to read

Learning experience ：

Language learning is not a fast process , The improvement of ability , It really needs the accumulation of knowledge , The connotation of every small code , Combine into large blocks of code , Large code blocks are combined into the whole software body , So as to complete the creation of systematic engineering .
Remind every learner not to be too impatient , Within the scope of your own time , Let Zhen knock the code , Ponder over the logic of the code , More accumulation , One day you finally , You will suddenly feel enlightened .