Rotate PDF Files with Python

Rotate PDF Files with Python: A Step-by-Step Guide

Hey there! This tutorial includes Correcting the orientation of PDF files with Python. Let’s dive straight into how you can rotate PDF files using the PyPDF2 library.

 Prerequisites :
Ensure Python is installed and install the PyPDF2 library using the following command

pip install PyPDF2

The Code

Below is the complete Python script to rotate a PDF file:

from PyPDF2 import PdfReader, PdfWriter

def rotate_pdf(input_pdf_path, output_pdf_path, rotation_angle):
   
    # Create a PdfReader object to read the input PDF
    reader = PdfReader(input_pdf_path)
    
    # Create a PdfWriter object to write the rotated PDF
    writer = PdfWriter()
    
    # Loop through each page in the PDF
    for page in reader.pages:
        # Rotate the page by the specified angle
        page.rotate(rotation_angle)
        # Add the rotated page to the writer object
        writer.add_page(page)
    
    # Write the rotated pages to the output PDF file
    with open(output_pdf_path, 'wb') as output_pdf:
        writer.write(output_pdf)

if __name__ == "__main__":
    # Define input and output file paths
    input_pdf =r"path\to\input\file\name_of_input_file.pdf"
    output_pdf =r"path\to\output\file\name_of_output_file.pdf"

    # example    
    # input_pdf = r"C:\Users\Siddhi Doiphode\Downloads\AI_TASK_SET.pdf"
    # output_pdf = r"C:\Users\Siddhi Doiphode\Downloads\output.pdf"

    # Set the rotation angle
    rotation_angle = 90  # Rotation angle (90, 180, or 270 degrees)

    # Call the function to rotate the PDF
    rotate_pdf(input_pdf, output_pdf, rotation_angle)
    print(f"Rotated PDF saved as {output_pdf}")

Code Breakdown

1. Importing Libraries:

   from PyPDF2 import PdfReader, PdfWriter
   

2. Defining the Function:

   def rotate_pdf(input_pdf_path, output_pdf_path, rotation_angle):

   The function takes three arguments: the input file path, the output file path, and the rotation angle.

3. Reading the PDF:

   reader = PdfReader(input_pdf_path)
   

   A  pdfReader object is created to read the input PDF file.

4. Creating a Writer Object:

   writer = PdfWriter()

   A PdfWriter object is initialized to hold the rotated pages.

5. Rotating and Adding Pages:

   for page in reader.pages:
       page.rotate(rotation_angle)
       writer.add_page(page)

   Each page is rotated by the specified angle and added to the writer object.

6. Saving the Rotated PDF:

   with open(output_pdf_path, 'wb') as output_pdf:
       writer.write(output_pdf)
   

   The writer object writes the rotated pages to a new file.

7. Main Block:

   if __name__ == "__main__":
       rotate_pdf(input_pdf, output_pdf, rotation_angle)
   

   This ensures the script runs only when executed directly.

8. Tips for Using the Script:

• File Paths: Use raw strings (r” . . . “) to avoid issues with backslashes in file paths.
• Rotation Angles: Only use valid angles: 90 , 180, 270 (Multiple of 90).

Output:

input pdf image: 

https://drive.google.com/file/d/1ylUfZaUUPK58KoYVB3OPpmROERYw1yma/view?usp=drive_link

output pdf image:

https://drive.google.com/file/d/10vYg_GNDAfvvWZInte5JBYSLZXhNo_Xc/view?usp=drive_link