import os
import time
from PyPDF2 import PdfReader, PdfWriter
def extract_pages(pdf_path, page_numbers):
# 创建PdfReader对象
pdf_reader = PdfReader(open(pdf_path, "rb"))
# 创建PdfWriter对象
pdf_writer = PdfWriter()
# 提取并合并指定页面
try:
for page_number in page_numbers:
page = pdf_reader.pages[page_number - 1] # 页面索引从0开始
pdf_writer.add_page(page)
except Exception as e:
print(f"提取页面时发生错误: {e}")
raise # 保留异常，让程序终止
return pdf_writer
def save_pdf(pdf_writer, output_path, increment=False):
# 检查文件是否存在并询问用户是否替换或加编号
while os.path.exists(output_path):
response = input(f"文件 {output_path} 已存在，是否替换？(y或者回车) 或 输入 'n' 自动添加编号：").lower()
if response == "y" or response == "":
break
elif response == "n":
increment = True
break
else:
print("无效输入，请重新选择。")
if increment:
base_name, ext = os.path.splitext(output_path)
i = 1
while os.path.exists(output_path):
output_path = f"{base_name}_{i}{ext}"
i += 1
# 保存PDF文件
with open(output_path, "wb") as out_file:
pdf_writer.write(out_file)
def format_page_range_string(page_numbers):
page_numbers.sort() # 确保页码有序
continuous_ranges = []
current_start = page_numbers[0]
current_end = page_numbers[0]
for num in page_numbers[1:]:
if num == current_end + 1: # 如果当前页码与前一页面连续
current_end = num # 更新当前范围的结束页码
else: # 当前页码与前一页面不连续，开始新的范围
continuous_ranges.append((current_start, current_end))
current_start = current_end = num
# 添加最后一个范围
continuous_ranges.append((current_start, current_end))
# 将连续范围转换为字符串形式并连接
formatted_ranges = [f"{start}-{end}" if start != end else str(start) for start, end in continuous_ranges]
return ",".join(formatted_ranges)
def parse_page_range(page_range_str):
ranges = []
for part in page_range_str.split(","):
if "-" in part:
start, end = map(int, part.split("-"))
ranges.extend(range(start, end + 1))
else:
ranges.append(int(part))
return sorted(ranges)
def list_pdf_files(directory):
pdf_files = []
for file in os.listdir(directory):
if file.lower().endswith('.pdf'):
pdf_files.append(file)
return pdf_files
def prompt_to_continue():
print("提取完成，是否继续提取？(回车继续/任意键退出)")
user_input = input().strip()
return user_input == ""
def main():
# 获取用户选择的PDF文件
directory = input("请输入当前目录路径或输入 'L/回车' 列出当前目录下的PDF文件：")
if directory.lower() == 'l' or directory.lower() == "":
pdf_files = list_pdf_files(os.getcwd())
print("当前目录下的PDF文件：")
for i, file in enumerate(pdf_files, start=1):
print(f"{i}. {file}")
selection = input("请选择一个PDF文件（输入序号）：")
if not selection.isdigit() or int(selection) len(pdf_files):
print("无效的选择，请输入有效的序号。")
return
pdf_path = os.path.join(os.getcwd(), pdf_files[int(selection) - 1])
else:
pdf_path = directory
while not os.path.isfile(pdf_path):
print("文件不存在，请检查路径是否正确。")
pdf_path = input("请重新输入当前目录路径或输入 'L' 列出当前目录下的PDF文件：")
if pdf_path.lower() == 'l':
pdf_files = list_pdf_files(os.getcwd())
print("当前目录下的PDF文件：")
for i, file in enumerate(pdf_files, start=1):
print(f"{i}. {file}")
selection = input("请选择一个PDF文件（输入序号）：")
if not selection.isdigit() or int(selection) len(pdf_files):
print("无效的选择，请输入有效的序号。")
return
pdf_path = os.path.join(os.getcwd(), pdf_files[int(selection) - 1])
break
# 获取用户选择的打印类型
print_types = {
"1": "黑白单面",
"2": "黑白双面",
"3": "彩色单面",
"4": "彩色双面"
}
for key, value in print_types.items():
print(f"{key}. {value}")
while True:
print_type = input("请选择打印类型（输入数字）：")
if print_type in print_types:
break
print("无效的打印类型，请输入正确的数字。")
# 获取用户输入的页面范围
while True:
page_range = input("请输入需要提取的页面范围（例如：1,2-5）：")
try:
page_numbers = parse_page_range(page_range)
break
except Exception as e:
print(f"输入的页面范围格式错误，请输入例如：1,2-5。错误信息：{e}")
formatted_page_range = format_page_range_string(page_numbers)
# 提取指定页面
pdf_writer = extract_pages(pdf_path, page_numbers)
# 根据打印类型和页面范围命名输出文件
output_dir, output_file = os.path.split(pdf_path)
output_name = f"{os.path.splitext(output_file)[0]}_{print_types[print_type]}_{formatted_page_range}.pdf"
output_path = os.path.join(output_dir, output_name)
# 保存PDF文件
save_pdf(pdf_writer, output_path)
# 提示用户是否继续
if prompt_to_continue():
main() # 重新调用main函数
print("等待10秒后自动退出...")
time.sleep(10)
if __name__ == "__main__":
main()
