Lock PDF using Python step-by-step

Lock PDF using Python step-by-step 

Method - 1

To lock a PDF file using Python, you can use the PyPDF2 library. The following steps outline the process:

Install the PyPDF2 library:

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pip install PyPDF2

Open the original PDF file and create a new PdfFileReader object:

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pdf_file = open("original.pdf", "rb")

pdf_reader = PyPDF2.PdfFileReader(pdf_file)

Create a new PdfFileWriter object to store the locked version of the PDF file:

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pdf_writer = PyPDF2.PdfFileWriter()

Loop through each page of the original PDF file and add it to the new PdfFileWriter object:

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for page_num in range(pdf_reader.numPages):

    page = pdf_reader.getPage(page_num)

    pdf_writer.addPage(page)

Encrypt the new PdfFileWriter object with a password:

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pdf_writer.encrypt("password")

Save the locked PDF file:

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locked_pdf = open("locked.pdf", "wb")

pdf_writer.write(locked_pdf)

Close both PDF files:

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locked_pdf.close()

pdf_file.close()

This code will lock the original PDF file and save the locked version as locked.pdf. The password used to encrypt the PDF file is "password". You can change the password to any string you like.

Complete code 

Here is the complete code to lock a PDF file using Python and the PyPDF2 library:

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import PyPDF2

# Open the original PDF file

pdf_file = open("original.pdf", "rb")

pdf_reader = PyPDF2.PdfFileReader(pdf_file)

# Create a new PdfFileWriter object

pdf_writer = PyPDF2.PdfFileWriter()

# Loop through each page of the original PDF file

for page_num in range(pdf_reader.numPages):

    page = pdf_reader.getPage(page_num)

    pdf_writer.addPage(page)

# Encrypt the new PdfFileWriter object

pdf_writer.encrypt("password")

# Save the locked PDF file

locked_pdf = open("locked.pdf", "wb")

pdf_writer.write(locked_pdf)

# Close both PDF files

locked_pdf.close()

pdf_file.close()

This code will lock the original PDF file and save the locked version as locked.pdf. The password used to encrypt the PDF file is "password". You can change the password to any string you like.

Method- 2

Another way to lock a PDF file using Python is by using the fpdf library. This library allows you to create PDF files from scratch, and you can also add password protection to the PDF file. Here is the code to lock a PDF file using fpdf:

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from fpdf import FPDF

# Create a new PDF object

pdf = FPDF()

# Add a new page to the PDF object

pdf.add_page()

# Add some text to the page

pdf.set_font("Arial", size=12)

pdf.cell(200, 10, txt="Hello, World!", ln=1, align="C")

# Set the password for the PDF file

pdf.set_protection(user_password="password", owner_password=None, permissions=None)

# Save the PDF file

pdf.output("locked.pdf", "F")

This code will create a new PDF file with one page that contains the text "Hello, World!". The PDF file will be password protected with the password "password". The user_password argument sets the password for opening the PDF file, and the owner_password argument sets the password for changing the PDF file's permissions. If owner_password is set to None, it means that the PDF file's permissions cannot be changed