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add pdf locker tutorial

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`@@ -49,6 +49,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy`
`49`	`49`	`-[How to Create a Zip File Locker in Python](https://thepythoncode.com/article/build-a-zip-file-locker-in-python). ([code](ethical-hacking/zip-file-locker))`
`50`	`50`	`-[How to Implement the Caesar Cipher in Python](https://thepythoncode.com/article/implement-caesar-cipher-in-python). ([code](ethical-hacking/caesar-cipher))`
`51`	`51`	`-[How to Crack the Caesar Cipher in Python](https://thepythoncode.com/article/how-to-crack-caesar-cipher-in-python). ([code](ethical-hacking/caesar-cipher))`
	`52`	`+-[How to Lock PDFs in Python](https://thepythoncode.com/article/lock-pdfs-in-python).[(code)](ethical-hacking/pdf-locker)`
`52`	`53`
`53`	`54`	`-###[Machine Learning](https://www.thepythoncode.com/topic/machine-learning)`
`54`	`55`	`-###[Natural Language Processing](https://www.thepythoncode.com/topic/nlp)`

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	`1`	`+#[How to Lock PDFs in Python](https://thepythoncode.com/article/lock-pdfs-in-python)`

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	`1`	`+# Import the necessary libraries`
	`2`	`+importPyPDF2,getpass# getpass is for getting password with some level of security`
	`3`	`+fromcoloramaimportFore,init`
	`4`	`+`
	`5`	`+# Initialize colorama for colored output`
	`6`	`+init()`
	`7`	`+`
	`8`	`+`
	`9`	`+# Function to lock pdf`
	`10`	`+deflock_pdf(input_file,password):`
	`11`	`+withopen(input_file,'rb')asfile:`
	`12`	`+# Create a PDF reader object`
	`13`	`+pdf_reader=PyPDF2.PdfReader(file)`
	`14`	`+`
	`15`	`+# Create a PDF writer object`
	`16`	`+pdf_writer=PyPDF2.PdfWriter()`
	`17`	`+`
	`18`	`+# Add all pages to the writer`
	`19`	`+forpage_numinrange(len(pdf_reader.pages)):`
	`20`	`+pdf_writer.add_page(pdf_reader.pages[page_num])`
	`21`	`+`
	`22`	`+# Encrypt the PDF with the provided password`
	`23`	`+pdf_writer.encrypt(password)`
	`24`	`+`
	`25`	`+# Write the encrypted content back to the original file`
	`26`	`+withopen(input_file,'wb')asoutput_file:`
	`27`	`+pdf_writer.write(output_file)`
	`28`	`+`
	`29`	`+`
	`30`	`+# Get user input`
	`31`	`+input_pdf=input("Enter the path to the PDF file: ")`
	`32`	`+password=getpass.getpass("Enter the password to lock the PDF: ")`
	`33`	`+`
	`34`	`+# Lock the PDF using PyPDF2`
	`35`	`+print(f'{Fore.GREEN}[!] Please hold on for a few seconds..')`
	`36`	`+lock_pdf(input_pdf,password)`
	`37`	`+`
	`38`	`+# Let the user know it's done`
	`39`	`+print(f"{Fore.GREEN}[+] PDF locked successfully.")`

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