Demerging the pdf file

projects/Demerge_pdfs/README.md

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+# Demerging_pdfs
+Python program to convert a large pdf file to number of different sized pdf files without any change in the large file.
+
+# Required Libraries
+PyPDF2,it can be installed by typing "pip3 install PyPDF2" on your command line
+
+# Author Name
+Darpan-Balar
+

projects/Demerge_pdfs/demerging_pdfs.py

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+import PyPDF2
+
+# Note: here instead of Python.pdf you should give the whole path to the pdf if the pdf is not present in the same directory where python program is present
+merged_pdf = open('Python.pdf', mode='rb')
+
+
+pdf = PyPDF2.PdfFileReader(merged_pdf)
+
+(u, ctr, x) = tuple([0]*3)
+for i in range(1, pdf.numPages+1):
+
+    if u >= pdf.numPages:
+        print("Successfully done!")
+        exit(0)
+    name = input("Enter the name of the pdf: ")
+    ctr = int(input(f"Enter the number of pages for {name}: "))
+    u += ctr
+    if u > pdf.numPages:
+        print('Limit exceeded! ')
+        break
+
+    # Note: In the braces you should give the desired path of where new files should be stored
+    base_path = '{}.pdf'
+    # If you want to store the new pdfs in the same directory, then leave the braces empty
+    path = base_path.format(name)
+    f = open(path, mode='wb')
+    pdf_writer = PyPDF2.PdfFileWriter()
+
+    for j in range(x, x+ctr):
+        page = pdf.getPage(j)
+        pdf_writer.addPage(page)
+
+    x += ctr
+
+    pdf_writer.write(f)
+    f.close()
+
+
+merged_pdf.close()
+print("Successfully done!")

projects/Demerge_pdfs/explanation.txt

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+yay,we have successfully demerged a "Python" book pdf containing 810 pages🥳.
+Python book was demerged into 4 books: Python1,Python2,Python3,Python4
+Bookname  No.of pages
+Python1    270
+Python2    270
+Python3    90
+Python4    180
+Total      810(270+270+90+180)
+
+This python script was a interactive program.
+It means the program when executed asks user to input and runs accordingly.
+Note: 
+1. We should be careful while giving no.of pages as input. If the given input exceeds the limit it will yell "Limit Exceeded!".
+2. We can always come out of the program if we need only some part of pdf.
+   Example: If we have a pdf of 400 pages and we need only first 200 pages of it in 2 different pages
+            then we can input for those 2 pdfs and then PRESS CMD+C(Mac) or CTRL+C(windows)
+