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利用pypdf2擷取pdf與合併pdf的程式，並利用API放上動態網站測試。

利用pypdf2擷取出3個pdf檔

# pypdf2_ex2.py
import os
from PyPDF2 import PdfFileWriter, PdfFileReader
  
pdfReader = PdfFileReader(open("2019_Book_PracticalFlutter.pdf", "rb"))
information = [("GitAndGithub",16,26),("GitAndGithub",36,46),("GitAndGithub",196,289)]
  
for page in range(len(information)):
    pdf_writer = PdfFileWriter()
    start = information[page][1]
    end = information[page][2]
    while start<=end:
        pdf_writer.addPage(pdfReader.getPage(start-1))
        start+=1
    if not os.path.exists("./"):
        os.makedirs(savepath)
    output_filename = '{}_{}_page_{}.pdf'.format(information[page][0],information[page][1], information[page][2])
    with open(output_filename,'wb') as out:
        pdf_writer.write(out)

再使用以下程式合併成一個pdf檔

# pypdf2_ex3.py
# merge several pdf files
import sys
import PyPDF2
 
pdf_write_object = PyPDF2.PdfFileWriter()
 
#for i in sys.argv[1:]:
for i in ["GitAndGithub_16_page_26.pdf","GitAndGithub_36_page_46.pdf","GitAndGithub_196_page_289.pdf"]:
pdf_read_object = PyPDF2.PdfFileReader(i)
print('processing file : '+ i + 'number of pages : ' + str(pdf_read_object.numPages))
for page in range(pdf_read_object.numPages):
pdf_write_object.addPage(pdf_read_object.getPage(page))
 
final_file_object = open('2020CMS.pdf', 'wb')
pdf_write_object.write(final_file_object)
final_file_object.close()

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