Decrypt PDF file by Python pyPDF

decrypt_PDF.py

#For python >= 3.9
#Required to install pypdf by pip install pypdf
#There will be an output  "Multiple definitions in dictionary at byte 0x1dc for key /Filter", but it's ok, file will still be decrypted

from pypdf import PdfReader, PdfWriter

def decrypt_pdf(input_path, output_path, password):
	with open(input_path, 'rb') as input_file, open(output_path, 'wb') as output_file:
    		reader = PdfReader(input_file,strict=False)
    		reader.decrypt(password)
		writer = PdfWriter()

		for i in range(len(reader.pages)):
			writer.add_page(reader.pages[i])
    
		writer.write(output_file)
    
if __name__ == '__main__':
	# example usage:
	input_file="C:/Testfolder/Test_encrypted_file.pdf"
	output_file="C:/Testfolder/Test_decrypted_file.pdf"
	decrypt_password="12345abcde"
	decrypt_pdf(input_file,output_file ,decrypt_password)