script to delete pages from a given PDF file. (avinashkranjan#294)

* added README,script,test file and output images to the folder

* Minor edit

Co-authored-by: Abhinav Anand <manasgmishra@gmail.com>

Author: Rahul555-droid

delete-pages-pdf/MyPDF.pdf

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+# Delete pages in a PDF
+
+- Using this script you can delete the pages you don't want with just one click.
+- I have added a test PDF with the script which you can run to test the script.
+
+## Setup instructions
+
+- We use **pdfrw** library for this script. 
+- To install this library, type `pip install pdfrw` in your terminal.
+- To run the script run  `python3 script.py` and then enter the information as prompted by the program.
+
+
+## Output
+
+A short demo of how the script works
+
+Here We have a pdf file MyPDF.pdf from which we have to delete pages.
+
+![Image 1](img/1.png)
+
+Running the script and entering path of the file and the page numbers to be deleted seperated by "," .
+
+![Image 2](img/2.png)
+
+The pages in the PDF file has been deleted
+
+![Image 3](img/3.png)
+
+
+## Author
+
+[Mohta Rahul Suresh](https://github.com/Rahul555-droid/)
+
+## Disclaimers
+
+**Once you delete the pages using this script they cannot be RETRIEVED so be CAREFUL!**

delete-pages-pdf/README.md

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+from pdfrw import PdfWriter, PdfReader
+import os
+
+
+def delete(path, del_page):
+    """
+    The function delete takes two arguments path and del_page
+    path is the path of the source pdf file.
+    This function deletes the pages from the pdf file.
+
+        Parameters:
+        path      : Path of the pdf file.
+        del_page  : A list of pages to be deleted.
+
+           Returns:
+               None    
+    """
+    # create a pdf object using PdfReader that could be read
+    pdf_obj = PdfReader(path)
+    # pdf_obj.pages attribute gives the length of the pages in pdf
+    total_pages = len(pdf_obj.pages)
+    print("Total Pages in PDF are:", total_pages)
+    # Initialising the writer object using the PdfWriter class
+    writer = PdfWriter()
+
+    # Adding only those pages that we need to this list excluding del_page
+    page_list = [page for page in range(
+        1, total_pages+1) if page not in del_page]
+
+    # Index of pdf_obj.pages starts from 0.
+    for page in page_list:
+        writer.addpage(pdf_obj.pages[page-1])
+
+    # removing the original pdf
+    os.remove(path)
+    # writing the modified file to the memory
+    writer.write(path)
+
+
+path = input("enter the path(full or relative) of the pdf file:")
+del_page = input(
+    "Enter the pages to be deleted seperated by comma(,):").strip().split(",")
+del_page = [int(i) for i in del_page]
+delete(path, del_page)
+print("\n\t pages", *del_page, "have been deleted successfully!!!")