251 lines
11 KiB
Python
251 lines
11 KiB
Python
from PyPDF2 import PdfReader, PdfWriter
|
||
import re # 导入正则表达式库
|
||
import os # 用于文件和文件夹操作
|
||
|
||
def clean_page_content(text, common_header):
|
||
"""
|
||
清理页面内容，通过删除公共抬头和页码。
|
||
"""
|
||
if common_header:
|
||
for header_line in common_header.split('\n'):
|
||
if header_line.strip():
|
||
# 替换首次出现的完整行
|
||
text = re.sub(r'^' + re.escape(header_line.strip()) + r'\n?', '', text, count=1)
|
||
|
||
# 删除页码，支持多种格式
|
||
text = re.sub(r'^\s*\d+\s*(?=\D)', '', text) # 删除开头的页码，仅当紧跟非数字字符时
|
||
text = re.sub(r'\s+\d+\s*$', '', text) # 删除结尾的页码
|
||
text = re.sub(r'\s*\/\s*\d+\s*', '', text) # 删除形如 /129 的页码
|
||
text = re.sub(r'\s*[—-]\s*\d+\s*[—-]\s*', '', text) # 删除形如 '—2—' 或 '-2-' 的页码
|
||
return text
|
||
|
||
|
||
def extract_common_header(pdf_path):
|
||
"""
|
||
从PDF的前几页提取公共抬头。
|
||
"""
|
||
pdf_document = PdfReader(pdf_path)
|
||
headers = []
|
||
total_pages = len(pdf_document.pages)
|
||
|
||
# 确定要读取的页数和起始页
|
||
pages_to_read = 2 if total_pages == 2 else 3
|
||
start_page = 0 if total_pages == 2 else max(0, (total_pages // 2) - 1)
|
||
|
||
for i in range(start_page, min(start_page + pages_to_read, total_pages)):
|
||
page = pdf_document.pages[i]
|
||
text = page.extract_text() or ""
|
||
if text:
|
||
# 只取每页的前三行
|
||
first_lines = text.strip().split('\n')[:3]
|
||
headers.append(first_lines)
|
||
|
||
if len(headers) < 2:
|
||
return "" # 如果没有足够的页来比较，返回空字符串
|
||
|
||
# 寻找每一行中的公共部分，按顺序保留
|
||
common_headers = []
|
||
for lines in zip(*headers):
|
||
first_words = lines[0].split()
|
||
common_line = [word for word in first_words if all(word in line.split() for line in lines[1:])]
|
||
if common_line:
|
||
common_headers.append(' '.join(common_line))
|
||
|
||
return '\n'.join(common_headers)
|
||
|
||
|
||
def is_pdf_or_doc(filename):
|
||
"""
|
||
判断文件是否为PDF或Word文档。
|
||
"""
|
||
return filename.lower().endswith(('.pdf', '.doc', '.docx'))
|
||
|
||
|
||
# def convert_to_pdf(file_path):
|
||
# """
|
||
# 如果是Word文档，则转换为PDF。
|
||
# """
|
||
# if file_path.lower().endswith(('.doc', '.docx')):
|
||
# return docx2pdf(file_path)
|
||
# return file_path
|
||
|
||
|
||
def save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix):
|
||
"""
|
||
将提取的页面保存为新的PDF文件，统一命名为 "bid_format.pdf" 并存放在独立的子文件夹中。
|
||
"""
|
||
try:
|
||
output_pdf_path = os.path.join(output_folder, "bid_format.pdf")
|
||
|
||
# 检查 start_page 和 end_page 是否为 None
|
||
if start_page is None or end_page is None:
|
||
print(f"起始页或结束页为 None: start_page={start_page}, end_page={end_page} 文件: {pdf_path}")
|
||
return ""
|
||
|
||
if start_page < 0 or end_page >= len(pdf_document.pages) or start_page > end_page:
|
||
print(f"无效的页面范围: {start_page} 到 {end_page} 文件: {pdf_path}")
|
||
return ""
|
||
|
||
output_doc = PdfWriter()
|
||
for page_num in range(start_page, end_page + 1):
|
||
output_doc.add_page(pdf_document.pages[page_num])
|
||
with open(output_pdf_path, 'wb') as f:
|
||
output_doc.write(f)
|
||
print(f"{output_suffix} 已截取并保存页面从 {start_page} 到 {end_page} 为 {output_pdf_path}")
|
||
return output_pdf_path
|
||
except Exception as e:
|
||
print(f"Error in save_extracted_pages for file {pdf_path}: {e}")
|
||
return "" # 返回空字符串
|
||
|
||
|
||
def extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header):
|
||
"""
|
||
通用函数，根据模式提取起始页和结束页。
|
||
"""
|
||
start_page = None
|
||
end_page = None
|
||
for i, page in enumerate(pdf_document.pages):
|
||
text = page.extract_text() or ""
|
||
cleaned_text = clean_page_content(text, common_header)
|
||
# print(cleaned_text)
|
||
if start_page is None and re.search(begin_pattern, cleaned_text) and i > begin_page:
|
||
start_page = i
|
||
if start_page is not None and re.search(end_pattern, cleaned_text) and i > start_page:
|
||
end_page = i
|
||
break
|
||
return start_page, end_page
|
||
|
||
def extract_pages_twice(pdf_path, output_folder, output_suffix, common_header):
|
||
pdf_document = PdfReader(pdf_path)
|
||
total_pages = len(pdf_document.pages) - 1 # 获取总页数
|
||
begin_page = 10
|
||
start_page = None
|
||
end_page = None
|
||
begin_patterns = [
|
||
re.compile(r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:响应|投标).*?格式.*', re.MULTILINE),
|
||
re.compile(r"\s*(投标文件格式|响应文件格式|响应性文件格式)\s*")
|
||
]
|
||
exclusion_pattern = re.compile(r'文件的构成|文件的组成|目录|评标办法|技术标准|其他材料|合同')
|
||
end_pattern = re.compile(
|
||
r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
|
||
for begin_pattern in begin_patterns:
|
||
for i, page in enumerate(pdf_document.pages):
|
||
text = page.extract_text() or ""
|
||
cleaned_text = clean_page_content(text, common_header)
|
||
if exclusion_pattern and re.search(exclusion_pattern, cleaned_text):
|
||
continue
|
||
if re.search(begin_pattern, cleaned_text) and i > begin_page:
|
||
start_page = i
|
||
if start_page is not None and re.search(end_pattern, cleaned_text) and i > start_page:
|
||
end_page = i
|
||
break
|
||
if start_page is not None:
|
||
break
|
||
if start_page is None:
|
||
print(f"{output_suffix}: 未找到起始页，提取失败！ 文件: {pdf_path}")
|
||
return ""
|
||
if end_page is None:
|
||
# 如果未匹配到结束页，默认截取到文件末尾
|
||
end_page = total_pages
|
||
print(f"{output_suffix}: 未找到结束页，默认截取到文件末尾。 文件: {pdf_path}")
|
||
return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
|
||
def extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
|
||
"""
|
||
根据开始和结束模式提取PDF页面。
|
||
"""
|
||
try:
|
||
common_header = extract_common_header(pdf_path)
|
||
pdf_document = PdfReader(pdf_path)
|
||
total_pages = len(pdf_document.pages) - 1 # 获取总页数
|
||
|
||
# 提取起始页和结束页
|
||
start_page, end_page = extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header)
|
||
|
||
if output_suffix == "format":
|
||
if start_page is None:
|
||
print(f"{output_suffix}: 未找到起始页，提取失败！ 文件: {pdf_path} 尝试二次提取！")
|
||
return extract_pages_twice(pdf_path,output_folder,output_suffix,common_header)
|
||
if end_page is None:
|
||
# 如果未匹配到结束页，默认截取到文件末尾
|
||
end_page = total_pages
|
||
print(f"{output_suffix}: 未找到结束页，默认截取到文件末尾。 文件: {pdf_path}")
|
||
return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
|
||
return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
|
||
except Exception as e:
|
||
print(f"Error processing {pdf_path}: {e}")
|
||
return ""
|
||
|
||
|
||
def process_files(file_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
|
||
"""
|
||
处理单个文件：转换为PDF（如果需要）并提取页面。
|
||
"""
|
||
# pdf_path = convert_to_pdf(file_path)
|
||
pdf_path=file_path
|
||
result = extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
|
||
return result or ""
|
||
|
||
|
||
def process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
|
||
"""
|
||
处理输入路径，可以是文件或目录。
|
||
"""
|
||
if not os.path.exists(output_folder):
|
||
os.makedirs(output_folder)
|
||
generated_files = []
|
||
|
||
if os.path.isdir(input_path):
|
||
for file_name in os.listdir(input_path):
|
||
file_path = os.path.join(input_path, file_name)
|
||
if is_pdf_or_doc(file_path):
|
||
result = process_files(file_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
|
||
if isinstance(result, tuple):
|
||
generated_files.extend([f if f else "" for f in result]) # 保留空字符串
|
||
else:
|
||
generated_files.append(result) # 直接添加result，可能是空字符串
|
||
elif os.path.isfile(input_path) and is_pdf_or_doc(input_path):
|
||
result = process_files(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
|
||
if isinstance(result, tuple):
|
||
generated_files.extend([f if f else "" for f in result]) # 保留空字符串
|
||
else:
|
||
generated_files.append(result) # 直接添加result，可能是空字符串
|
||
else:
|
||
print("提供的路径既不是文件夹也不是PDF文件。")
|
||
|
||
return generated_files
|
||
|
||
|
||
def truncate_pdf_main(input_path, output_folder, selection,begin_page=10):
|
||
"""
|
||
主函数，根据选择截取PDF内容。
|
||
"""
|
||
try:
|
||
if selection == 1: # 投标文件格式
|
||
begin_pattern = re.compile(
|
||
r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:响应|投标).*?格式.*'
|
||
)
|
||
end_pattern = re.compile(
|
||
r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE
|
||
)
|
||
local_output_suffix = "format"
|
||
else:
|
||
print("无效的选择:请选择1")
|
||
return None
|
||
|
||
# 调用相应的处理函数
|
||
return process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, local_output_suffix) or ""
|
||
except Exception as e:
|
||
print(f"Error in truncate_pdf_main: {e}")
|
||
return "" # 返回空字符串
|
||
|
||
|
||
if __name__ == "__main__":
|
||
# 定义输入和输出路径
|
||
# input_path = "C:\\Users\\Administrator\\Desktop\\货物标\\zbfiles\\招标文件(2).pdf"
|
||
input_path="C:\\Users\\Administrator\\Desktop\\招标文件\\招标test文件夹\\zbtest12.pdf"
|
||
output_folder = "C:\\Users\\Administrator\\Desktop\\货物标\\zbfiles\\新建文件夹"
|
||
selection = 1 # 1 - 投标文件格式
|
||
# 执行截取
|
||
generated_files = truncate_pdf_main(input_path, output_folder, selection)
|
||
print("生成的文件:", generated_files)
|