That way, you can use first_page later to extract the text on the right side of the page. You convert pdf_path to a string because PdfFileReader doesn’t know how to read from a pathlib.Path object. .decrypt() returns an integer representing the success of the decryption: Once you’ve decrypted the file, you can access the contents of the PDF: Now you can extract text and crop or rotate pages to your heart’s content! I now have a number of books on Python and the Real Python ones are the only ones I have actually ?nished cover to cover, and they are hands down the best on the market. PageObject instances like first_page have a .mediaBox attribute that represents a rectangular area defining the boundaries of the page. Create a new file called rotated.pdf in your computer’s home directory that contains all of the pages from split_and_rotate.pdf, but each one is rotated counterclockwise by 90 degrees. You can add password protection to a PDF file using the .encrypt() method of a PdfFileWriter() instance. Sometimes pass is useful in the final code that runs in production. But instead of joining the second PDF to the end of the first, merging allows you to insert it after a specific page in the first PDF. To finish out the solution, write the contents of pdf_writer to a new file: Now you can open the ugly_rotated2.pdf file in your current working directory and compare it to the ugly_rotated.pdf file you generated earlier. How would you crop the page so that just the text on the left side of the page is visible? If you’d like a challenge, you could also create a command line interface for this function using Python’s argparse module. Let’s revisit the Pride and Prejudice PDF that you worked with in the previous section. In the practice_files/ folder in the companion repository for this article, there is a file called top_secret.pdf. At each step in the loop, the page at the current index is extracted with .getPage() and added to the pdf_writer using .addPage(). The .units module contains several helper objects, such as inch and cm, that simplify your conversions. But you’ve only scratched the surface. A weekly Python podcast hosted by Christopher Bailey with interviews, coding tips, and conversation with guests from the Python community. Or perhaps they are even upside down. The text from each page is extracted with page.extractText() and is written to the output_file. Mixed in with all that nonsensical-looking stuff is a key called /Rotate, which you can see on the fourth line of output above. The traceback you see on your computer will be much longer. You might need to do this to split a single page into multiple pages or to extract just a small portion of a page, such as a signature or a figure. You also call .getNumPages() on the reader object, which returns the number of pages in the document. Search. CountersandTimers 49 PWM 50 Serial I/O 51 ParallelI/O 54 Summary 55 SuggestedReading 56 3. Join us and get access to hundreds of tutorials, hands-on video courses, and a community of expert Pythonistas: Real Python Comment Policy: The most useful comments are those written with the goal of learning from or helping out other readers—after reading the whole article and all the earlier comments. ReportLab is a full-featured solution for creating PDFs. Notice that the page gets rotated if the index is even. Next, let’s see how to decrypt PDF files with PyPDF2. You already worked out that you need to move the upper right-hand corner of the .mediaBox to the top center of the page. Real-time Face recognition python project with OpenCV. This is the second edition of Think Python, which uses Python 3. Note: One word of warning about the /Rotate key: it’s not guaranteed to exist on a page. David is a mathematician by training, a data scientist/Python developer by profession, and a coffee junkie by choice. In a real-world scenario, it isn’t practical to go through an entire PDF taking note of which pages to rotate. DESCRIPTION You are given 5 assignments to practice real applications of Python. You will likely spend as much time downloading the package as you will installing it. Almost there! Now that you’ve created a PdfFileReader instance, you can use it to gather information about the PDF. This parameter accepts a tuple of floating-point values representing the width and height of the page in points. In this section, you’ll use the ReportLab Toolkit to generate PDF files from scratch. Then for page two, you call .rotateCounterClockwise() and pass it 90 degrees as well. You can use the PdfFileWriter to create a new PDF file. Share Let’s get that now using the pathlib module: The pdf_path variable now contains the path to a PDF version of Jane Austen’s Pride and Prejudice. Let’s go ahead and write some code that you can use to merge PDFs together: You can use merge_pdfs() when you have a list of PDFs that you want to merge together. In the following example, you create a PDF file with blue text named font-colors.pdf: blue is an object imported from the reportlab.lib.colors module. When you call .append(), all of the pages in the PDF file are appended to the set of pages in the PdfFileMerger object. Complaints and insults generally wonât make the cut here. Python is a beautiful language. More often, … The sample you want to download is called reportlab-sample.pdf. The with statement, which you learned about in chapter 12, “File Input and Output,” ensures that the file is closed when the with block exits. Let’s fix that. Since the table of contents PDF is only one page, it gets inserted at index 1. Both the report PDF and the table of contents PDF can be found in the quarterly_report/ subfolder of the practice_files folder. That’s because .rotateClockwise() returns a PageObject instance. You can do this by creating a list containing the three file paths and then calling .sort() on that list: Remember that .sort() sorts a list in place, so you don’t need to assign the return value to a variable. That might seem strange since the odd-numbered pages in the PDF are the ones that are rotated incorrectly. Next, you can use .GetPage() to get the desired page. Go ahead and write the cropped page to a new PDF file: If you open the cropped_page.pdf file in your current working directory, then you’ll see that the top portion of the page has been removed. You can use PyPDF2 to extract metadata and some text from a PDF. In a new IDLE interactive window, start by importing the PdfFileReader and PdfFileWriter classes from PyPDF2, as well as the Path class from the pathlib module: Now create a Path object for the ugly.pdf file: Finally, create new PdfFileReader and PdfFileWriter instances: Your goal is to use pdf_writer to create a new PDF file in which all of the pages have the correct orientation. While the PDF was originally invented by Adobe, it is now an open standard that is maintained by the International Organization for Standardization (ISO). You can open it with a PDF reader and see the text Hello, World at the bottom of the page! So, right_side.mediaBox is now a rectangle whose upper-left corner is at the top center of the page and whose upper-right corner is at the top right of the page. The value of /Rotate may not always be what you expect. Python and Robotics •Python as the brain of a robot: –Complete in terms of Scientific tools available –Extremely Intuitive and Simple Syntax •Microcontrollers as the External Interface to Python –Ability to Interface with Python –Ability to ‘Perceive’ External Data –Take Decisions based on Environment through Python The last topic you will learn about is how PyPDF2 handles encryption. Stuck at home? In the practice_files/ folder in the companion repository for this article, there are two files called merge1.pdf and merge2.pdf. They represent the number of points contained in each unit. There are a lot of different kinds of data to decode when opening a PDF file! intermediate You’ll start by learning how to rotate pages. Then it gives a prompt of its own, three “greater than” characters. Sometimes you need to extract every page from a PDF. The next step is to iterate over the pages in the input_pdf. Then you loop over the inputs and create a PDF reader object for each of them. Share Another term for watermark is overlay. Open IDLE’s interactive window and import the PdfFileReader class from the PyPDF2 package: To create a new instance of the PdfFileReader class, you’ll need the path to the PDF file that you want to open. This can happen when someone scans a document to PDF or email. For example, the following for loop prints the text from every page in the Pride and Prejudice PDF: Let’s combine everything you’ve learned and write a program that extracts all of the text from the Pride_and_Prejudice.pdf file and saves it to a .txt file. Set up the Canvas instance with letter-sized pages: Now draw the string "Hello, Real Python!" Each code listing in the book references a corresponding file name in this repository. That will give you a couple of inputs to use for example purposes. # You might need to change this to match the path, # Change the path to work on your computer if necessary. In other words, it’s been rotated counterclockwise by ninety degrees. You don’t need to create your own PageObject instances directly. There is a commercial version that costs money to use, but a limited-feature open source version is also available. # Then create a `Path` object to the PDF file. The PDF, or Portable Document Format, is one of the most common formats for sharing documents over the Internet. This can be useful when you’re doing certain types of automation on your preexisting PDF files. For example, .getNumPages() returns the number of pages contained in the PDF file: Notice that .getNumPages() is written in mixedCase, not lower_case_with_underscores as recommended in PEP 8. You can use Python to help you do that sort of thing. Let’s explore this class and learn the steps needed to create a PDF using PyPDF2. Iwas almost100%sureaboutthereasonwhytheendproductwasamuch The PdfFileWriter class creates new PDF files. You’ll need to add some pages to your object before you can do anything with it. The last official release of pyPdf was in 2010. Coding exercises within each chapter and our … For example, you might have a standard cover page that needs to go on to many types of reports. The PdfFileReader object does all of this for you, so you don’t need to worry about opening or closing the PDF file! The names of the three files are listed, but they aren’t in order. The first_page object now contains only the information present within the boundaries of the new RectangleObject. Each tutorial at Real Python is created by a team of developers so that it meets our high quality standards. On the other hand, the user password just allows you to open the document. Curated by the Real Python team. Finally, add the left_side and right_side pages to pdf_writer and write them to a new PDF file: Now open the cropped_pages.pdf file with a PDF reader. Complete this form and click the button below to gain instant access: Creating and Modifying PDF Files in Python (Sample Materials). The last page can be accessed with the index -1: Now you can create a PdfFileWriter instance and add the last page to it: Finally, write the contents of pdf_writer to the file last_page.pdf in your home directory: Two common tasks when working with PDF files are concatenating and merging several PDFs into a single file. This method takes an integer argument, in degrees, and rotates a page clockwise by that many degrees. This might seem like a big problem, but in many situations, you don’t need to create new content. The first technique is to loop over the indices of the pages in the PDF and check if each index corresponds to a page that needs to be rotated. For example, a company may concatenate several daily reports into one monthly report at the end of a month. It has two main parameters: Let’s use .encrypt() to add a password to a PDF file. In both cases, you add pages to instances of the class and then write them to a file. The biggest difference when it comes to pdfrw is that it integrates with the ReportLab package so that you can take a preexisting PDF and build a new one with ReportLab using some or all of the preexisting PDF. '/MediaBox': [0, 0, 612, 792], '/Parent': IndirectObject(1, 0), '/Resources': IndirectObject(8, 0), '/Rotate': 0, '/Type': '/Page'}, Author: Andy Robinson, Robin Becker, the ReportLab team, Author-email: firstname.lastname@example.org. INSTRUCTOR. Now write the contents of pdf_writer to a new file: You now have a new PDF file saved in your current working directory called first_page.pdf, which contains the cover page of the Pride_and_Prejudice.pdf file. My name is Andrew from Real Python, and today I am going to take you through working with PDFs in Python using the PyPDF2 package. For example, to set the page size to 8.5 inches wide by 11 inches tall, you would create the following Canvas: (612, 792) represents a letter-sized paper because 8.5 times 72 is 612, and 11 times 72 is 792. To make things easy, I went to Leanpub and grabbed a sample of one of my books for this exercise. Real World Python This repository contains the source code and supporting files for the book Real World Python: A Hacker’s Guide to Solving Problems with Code by Lee Vaughan. Now let’s learn how you can merge multiple PDFs into one. If you open the file with a PDF reader, such as Adobe Acrobat, then you’ll see a document with a single blank one-inch-square page. Go ahead and add a blank page to pdf_writer: The width and height parameters are required and determine the dimensions of the page in units called points. However, the page numbers in the PDF start with 1, whereas the page indices start with 0. A Web framework is a set of components that provide a standard way to develop websites fast and easily. Open up the font-example.pdf file in your current working directory and check it out! One item I would like to point out is that you could enhance this script a bit by adding in a range of pages to be added if you didn’t want to merge all the pages of each PDF. Regardless, this is how you can add a password, which will also inherently encrypt the PDF: add_encryption() takes in the input and output PDF paths as well as the password that you want to add to the PDF. Let’s explore what you can do with a PDF file and how you can do it! The two advantages of this book are that it starts from a modern technology (Python 3) and builds on the experience the author has in teaching real students. Now that you’ve rotated all the pages in the PDF, you can write the content of pdf_writer to a new file and check that everything worked: You should now have a file in your current working directory called ugly_rotated.pdf, with the pages from the ugly.pdf file all rotated correctly. This is the second edition of Think Python, which uses Python 3. … Get a short & sweet Python Trick delivered to your inbox every couple of days. There are a few things to notice about the PDF you just created: When you instantiate a Canvas object, you can change the page size with the optional pagesize parameter. and with\\n \\nalmost no restrictions whatsoever. So, by creating a new instance, you’re starting fresh. You can work with a preexisting PDF in Python by using the PyPDF2 package. Peter needs to concatenate these three PDFs and submit them to his employer as a single PDF file so that he can get reimbursed for some work-related expenses. 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