pip install PyPDF2

import PyPDF2

# 打開(kāi)要保護(hù)的PDF文件
with open('example.pdf', 'rb') as pdf_file:
    # 創(chuàng)建PDF閱讀對(duì)象
    pdf_reader = PyPDF2.PdfFileReader(pdf_file)
    
    # 創(chuàng)建PDF寫(xiě)入對(duì)象
    pdf_writer = PyPDF2.PdfFileWriter()

    # 設(shè)置密碼
    pdf_writer.addPage(pdf_reader.getPage(0))
    pdf_writer.encrypt('mypassword')

    # 保存帶有密碼保護(hù)的PDF文件
    with open('protected_example.pdf', 'wb') as protected_pdf_file:
        pdf_writer.write(protected_pdf_file)

import PyPDF2

# 輸入密碼
password = input("請(qǐng)輸入密碼: ")

# 打開(kāi)受保護(hù)的PDF文件
with open('protected_example.pdf', 'rb') as protected_pdf_file:
    # 創(chuàng)建PDF閱讀對(duì)象
    pdf_reader = PyPDF2.PdfFileReader(protected_pdf_file)
    
    # 解鎖PDF文件
    if pdf_reader.decrypt(password):
        # 打印PDF文件的總頁(yè)數(shù)
        print(f"總頁(yè)數(shù): {pdf_reader.numPages}")
    else:
        print("密碼錯(cuò)誤，無(wú)法打開(kāi)文件。")

import PyPDF2

# 輸入原始密碼和新密碼
original_password = input("請(qǐng)輸入原始密碼: ")
new_password = input("請(qǐng)輸入新密碼（按回車跳過(guò)）: ")

# 打開(kāi)原始受保護(hù)的PDF文件
with open('protected_example.pdf', 'rb') as protected_pdf_file:
    # 創(chuàng)建PDF閱讀對(duì)象
    pdf_reader = PyPDF2.PdfFileReader(protected_pdf_file)
    
    # 解鎖PDF文件
    if pdf_reader.decrypt(original_password):
        # 創(chuàng)建PDF寫(xiě)入對(duì)象
        pdf_writer = PyPDF2.PdfFileWriter()
        
        # 復(fù)制頁(yè)面到新文件
        for page_num in range(pdf_reader.numPages):
            page = pdf_reader.getPage(page_num)
            pdf_writer.addPage(page)
        
        # 設(shè)置新密碼（如果提供了新密碼）
        if new_password:
            pdf_writer.encrypt(new_password)
        
        # 保存新的PDF文件
        with open('modified_example.pdf', 'wb') as modified_pdf_file:
            pdf_writer.write(modified_pdf_file)
        
        print("PDF文件密碼已修改并保存為'modified_example.pdf'。")
    else:
        print("原始密碼錯(cuò)誤，無(wú)法修改文件密碼。")

import PyPDF2

# 輸入密碼
password = input("請(qǐng)輸入密碼: ")

# 打開(kāi)受保護(hù)的PDF文件
with open('protected_example.pdf', 'rb') as protected_pdf_file:
    # 創(chuàng)建PDF閱讀對(duì)象
    pdf_reader = PyPDF2.PdfFileReader(protected_pdf_file)
    
    # 解鎖PDF文件
    if pdf_reader.decrypt(password):
        # 創(chuàng)建PDF寫(xiě)入對(duì)象
        pdf_writer = PyPDF2.PdfFileWriter()
        
        # 復(fù)制頁(yè)面到新文件
        for page_num in range(pdf_reader.numPages):
            page = pdf_reader.getPage(page_num)
            pdf_writer.addPage(page)
        
        # 保存新的PDF文件（不設(shè)置密碼）
        with open('unprotected_example.pdf', 'wb') as unprotected_pdf_file:
            pdf_writer.write(unprotected_pdf_file)
        
        print("密碼已刪除，PDF文件保存為'unprotected_example.pdf'。")
    else:
        print("密碼錯(cuò)誤，無(wú)法刪除密碼。")

import PyPDF2
import os

# 指定PDF文件所在文件夾路徑
pdf_folder = 'pdf_files'

# 輸入密碼（或原始密碼和新密碼）
password = input("請(qǐng)輸入密碼（或原始密碼和新密碼，以逗號(hào)分隔）: ")

# 將輸入的密碼拆分為原始密碼和新密碼
passwords = password.split(',')

# 獲取PDF文件夾中的所有PDF文件
pdf_files = [f for f in os.listdir(pdf_folder) if f.endswith('.pdf')]

for pdf_file in pdf_files:
    pdf_path = os.path.join(pdf_folder, pdf_file)
    
    # 打開(kāi)PDF文件
    with open(pdf_path, 'rb') as pdf_file:
        # 創(chuàng)建PDF閱讀對(duì)象
        pdf_reader = PyPDF2.PdfFileReader(pdf_file)
        
        # 解鎖PDF文件
        if pdf_reader.decrypt(passwords[0]):
            # 創(chuàng)建PDF寫(xiě)入對(duì)象
            pdf_writer = PyPDF2.PdfFileWriter()
            
            # 復(fù)制頁(yè)面到新文件
            for page_num in range(pdf_reader.numPages):
                page = pdf_reader.getPage(page_num)
                pdf_writer.addPage(page)
            
            # 設(shè)置新密碼（如果提供了新密碼）
            if len(passwords) > 1:
                pdf_writer.encrypt(passwords[1])
            
            # 保存新的PDF文件
            output_path = os.path.join(pdf_folder, f'unlocked_{pdf_file}')
            with open(output_path, 'wb') as output_pdf_file:
                pdf_writer.write(output_pdf_file)
            
            print(f"已處理文件：{pdf_file}，保存為：{output_path}")
        else:
            print(f"密碼錯(cuò)誤，無(wú)法處理文件：{pdf_file}")