398 lines
18 KiB
Python
398 lines
18 KiB
Python
from PyPDF2 import PdfReader, PdfWriter
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import re # 导入正则表达式库
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import os # 用于文件和文件夹操作
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from flask_app.main.format_change import docx2pdf
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def clean_page_content(text, common_header):
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# 首先删除抬头公共部分
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if common_header: # 确保有公共抬头才进行替换
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for header_line in common_header.split('\n'):
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if header_line.strip(): # 只处理非空行
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# 替换首次出现的完整行
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text = re.sub(r'^' + re.escape(header_line.strip()) + r'\n?', '', text, count=1)
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# 删除页码 eg:89/129 这个代码分三步走可以把89/129完全删除
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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
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text = re.sub(r'\s+\d+\s*$', '', text) # 删除结尾的页码
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text = re.sub(r'\s*\/\s*\d+\s*', '', text) # 删除形如 /129 的页码
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return text
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def extract_common_header(pdf_path):
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pdf_document = PdfReader(pdf_path)
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headers = []
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total_pages = len(pdf_document.pages)
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# 确定要读取的页数和起始页
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if total_pages == 2:
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pages_to_read = 2
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start_page = 0
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else:
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pages_to_read = 3
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middle_page = total_pages // 2
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start_page = max(0, middle_page - 1)
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for i in range(start_page, min(start_page + pages_to_read, total_pages)):
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page = pdf_document.pages[i]
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text = page.extract_text() or ""
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if text:
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# 只取每页的前三行
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first_lines = text.strip().split('\n')[:3]
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headers.append(first_lines)
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if len(headers) < 2:
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return "" # 如果没有足够的页来比较，返回空字符串
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# 寻找每一行中的公共部分
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common_headers = []
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for lines in zip(*headers):
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# 在每一行中寻找公共单词
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common_line = set(lines[0].split()).intersection(*[set(line.split()) for line in lines[1:]])
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if common_line:
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common_headers.append(' '.join(common_line))
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return '\n'.join(common_headers)
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def is_pdf_or_doc(filename):
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# 判断文件是否为PDF或Word文档
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return filename.lower().endswith(('.pdf', '.doc', '.docx'))
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def convert_to_pdf(file_path):
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# 假设 docx2pdf 函数已经被定义，这里仅根据文件扩展名来决定是否需要转换
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if file_path.lower().endswith(('.doc', '.docx')):
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return docx2pdf(file_path)
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return file_path
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def judge_file_exist(original_path, new_suffix):
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# 提取目录路径和原始文件名
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directory = os.path.dirname(original_path)
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original_filename = os.path.basename(original_path)
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# 替换文件名中的旧后缀为新后缀
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# 假设原始文件名格式为 '2-招标文件_qualification.pdf'
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# 需要替换 '_qualification' 部分为 '_qualification2'
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new_filename = original_filename.replace("_qualification1", f"_{new_suffix}")
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new_filename = new_filename.replace("_qualification2", f"_{new_suffix}")
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# 生成新的文件路径
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new_file_path = os.path.join(directory, new_filename)
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# 检查新文件是否存在
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if os.path.isfile(new_file_path):
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return new_file_path
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else:
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return None
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def merge_pdfs(paths, output_path):
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pdf_writer = PdfWriter()
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last_page_text = None # 用于存储上一个PDF的最后一页的文本
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for path in paths:
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pdf_reader = PdfReader(path)
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pages = pdf_reader.pages
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start_index = 0 # 从第一页开始添加
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# 如果这不是第一个文件，并且有上一个文件的最后一页文本
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if last_page_text is not None and len(pages) > 0:
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current_first_page_text = pages[0].extract_text() if pages[0].extract_text() else ""
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# 比较当前文件的第一页和上一个文件的最后一页的文本
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if current_first_page_text == last_page_text:
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start_index = 1 # 如果相同，跳过当前文件的第一页
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# 添加当前PDF的页面到写入器
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for page in range(start_index, len(pages)):
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pdf_writer.add_page(pages[page])
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# 更新last_page_text为当前PDF的最后一页的文本
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if len(pages) > 0:
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last_page_text = pages[-1].extract_text() if pages[-1].extract_text() else ""
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# 写入合并后的PDF到文件
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with open(output_path, 'wb') as out:
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pdf_writer.write(out)
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def merge_and_cleanup(output_pdf_path, suffix_to_merge):
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another_file_path = judge_file_exist(output_pdf_path, suffix_to_merge)
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if another_file_path:
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paths = [output_pdf_path, another_file_path] # 需要合并的 PDF 文件路径
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merge_pdfs(paths, output_pdf_path)
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os.remove(another_file_path)
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print(f"文件 {another_file_path} 已删除。")
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def process_files(file_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
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pdf_path = convert_to_pdf(file_path)
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result = extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
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if result:
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if output_suffix == "tobidders_notice":
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return result # 返回包含两个路径的元组
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elif output_suffix == "qualification1":
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merge_and_cleanup(result, "qualification3")
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return result
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return None
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def process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
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if not os.path.exists(output_folder):
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os.makedirs(output_folder)
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generated_files = []
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# 判断输入是目录还是单个文件，并统一处理
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if os.path.isdir(input_path):
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for file_name in os.listdir(input_path):
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file_path = os.path.join(input_path, file_name)
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if is_pdf_or_doc(file_path):
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result = process_files(file_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
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if result:
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if isinstance(result, tuple):
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generated_files.extend(result)
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else:
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generated_files.append(result)
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elif os.path.isfile(input_path) and is_pdf_or_doc(input_path):
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result = process_files(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
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if result:
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if isinstance(result, tuple):
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generated_files.extend(result)
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else:
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generated_files.append(result)
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else:
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print("提供的路径既不是文件夹也不是PDF文件。")
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return generated_files
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def extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header, exclusion_pattern=None):
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start_page = None
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end_page = None
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for i, page in enumerate(pdf_document.pages):
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text = page.extract_text() or ""
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cleaned_text = clean_page_content(text, common_header)
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if exclusion_pattern and re.search(exclusion_pattern, cleaned_text):
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continue
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if start_page is None and re.search(begin_pattern, cleaned_text) and i > begin_page:
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start_page = i
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if start_page is not None and re.search(end_pattern, cleaned_text) and i > start_page:
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end_page = i
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break
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return start_page, end_page
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def extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
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try:
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common_header = extract_common_header(pdf_path)
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pdf_document = PdfReader(pdf_path)
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exclusion_pattern = None
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if output_suffix == "tobidders_notice":
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start_page, mid_page, end_page = extract_pages_tobidders_notice(pdf_document, begin_pattern, end_pattern,
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begin_page, common_header)
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if start_page is None or mid_page is None or end_page is None:
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print(f"first: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！尝试备用提取策略。")
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return extract_pages_twice_tobidders_notice(pdf_path, output_folder, output_suffix, common_header)
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path1 = save_extracted_pages(pdf_document, start_page, mid_page, pdf_path, output_folder,
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"tobidders_notice_part1")
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path2 = save_extracted_pages(pdf_document, mid_page, end_page, pdf_path, output_folder,
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"tobidders_notice_part2")
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return path1, path2
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else:
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# 原有的处理逻辑保持不变
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if output_suffix == "qualification1":
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exclusion_pattern = re.compile(r'文件的构成|文件的组成|须对应|需对应|须按照|需按照|须根据|需根据')
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start_page, end_page = extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header, exclusion_pattern)
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if start_page is None or end_page is None:
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print(f"first: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！尝试备用提取策略。")
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return extract_pages_twice(pdf_path, output_folder, output_suffix, common_header)
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elif output_suffix == "qualification1":
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truncate_pdf_main(pdf_path, output_folder, 2, "qualification3")
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return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
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except Exception as e:
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print(f"Error processing {pdf_path}: {e}")
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return None
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def extract_pages_tobidders_notice(pdf_document, begin_pattern, end_pattern, begin_page, common_header):
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start_page = None
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mid_page = None
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end_page = None
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for i, page in enumerate(pdf_document.pages):
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text = page.extract_text() or ""
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cleaned_text = clean_page_content(text, common_header)
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if start_page is None and re.search(begin_pattern, cleaned_text) and i > begin_page:
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start_page = i
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if start_page is not None and mid_page is None and re.search(
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r'^\s*[（(]?\s*[一1]\s*[)）]?\s*[、.]*\s*(说\s*明|总\s*则)', cleaned_text, re.MULTILINE):
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mid_page = i
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if start_page is not None and mid_page is not None and re.search(end_pattern, cleaned_text) and i > mid_page:
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end_page = i
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break
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return start_page, mid_page, end_page
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def get_patterns_for_procurement():
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begin_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:服务|项目|商务).*?要求|'
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:采购|技术标准).*|'
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r'^[一二三四五六七八九十百千]+、\s*采购清单', re.MULTILINE)
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end_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
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return begin_pattern, end_pattern
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def get_patterns_for_evaluation_method():
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begin_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(磋商|谈判|评标|评定|评审)(方法|办法).*', re.MULTILINE)
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end_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
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return begin_pattern, end_pattern
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def get_patterns_for_qualification():
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# # 原始匹配逻辑
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# begin_pattern_original = re.compile(
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# r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(资格审查).*', re.MULTILINE)
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# end_pattern_original = re.compile(
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# r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
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# 新匹配逻辑
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begin_pattern_new = re.compile(
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r'^资格性检查', re.MULTILINE)
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end_pattern_new = re.compile(
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r'^附件\s*\d+|^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
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return begin_pattern_new, end_pattern_new
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def extract_pages_twice_tobidders_notice(pdf_path, output_folder, output_suffix, common_header): #投标人须知前附表/正文二次提取
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begin_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*(?:(?:投标人|磋商|供应商|谈判供应商|磋商供应商)须知前附表)+'
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)
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end_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+'
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)
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pdf_document = PdfReader(pdf_path)
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# 提取第一部分
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start_page1, end_page1 = extract_pages_generic(pdf_document, begin_pattern, end_pattern, -1, common_header)
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if start_page1 is None or end_page1 is None:
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print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！")
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return None, None
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# 提取第二部分
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start_page2 = end_page1 # 第二部分的开始页就是第一部分的结束页
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_, end_page2 = extract_pages_generic(pdf_document, end_pattern, end_pattern, start_page2 - 1, common_header)
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if end_page2 is None:
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print(f"second: {output_suffix} 未找到第二部分的结束页在文件 {pdf_path} 中！")
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return None, None
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# 保存提取的页面
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path1 = save_extracted_pages(pdf_document, start_page1, end_page1, pdf_path, output_folder, "tobidders_notice_part1")
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path2 = save_extracted_pages(pdf_document, start_page2, end_page2, pdf_path, output_folder, "tobidders_notice_part2")
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return path1, path2
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def extract_pages_twice(pdf_path, output_folder, output_suffix, common_header):
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exclusion_pattern = re.compile(r'文件的构成|文件的组成|须对应|需对应|须按照|需按照|须根据|需根据')
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pdf_document = PdfReader(pdf_path)
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patterns = None
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if output_suffix == "procurement":
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patterns = [get_patterns_for_procurement()]
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elif output_suffix == "evaluation_method" or output_suffix=="qualification2" or output_suffix=="qualification3":
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patterns = [get_patterns_for_evaluation_method()]
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elif output_suffix == "qualification1":
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patterns = [get_patterns_for_qualification()] # This now returns a tuple of pattern pairs
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# Try each set of patterns until a valid range is found
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for pattern_pair in patterns:
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start_page, end_page = extract_pages_generic(pdf_document, pattern_pair[0], pattern_pair[1], 5, common_header,
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exclusion_pattern)
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if start_page is not None and end_page is not None:
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break
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if start_page is None or end_page is None:
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if output_suffix == "qualification1":
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print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！")
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print("third:尝试提取评分办法章节...")
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temp=truncate_pdf_main(pdf_path,output_folder,2,"qualification2")
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if len(temp) > 0:
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return temp[0]
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else:
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return None
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else:
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print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！")
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return ""
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return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
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def save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix):
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base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]
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output_pdf_path = os.path.join(output_folder, f"{base_file_name}_{output_suffix}.pdf")
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output_doc = PdfWriter()
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for page_num in range(start_page, end_page + 1):
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output_doc.add_page(pdf_document.pages[page_num])
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with open(output_pdf_path, 'wb') as f:
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output_doc.write(f)
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print(f"{output_suffix} 已截取并保存页面从 {start_page} 到 {end_page} 为 {output_pdf_path}")
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return output_pdf_path
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def truncate_pdf_main(input_path, output_folder, selection, output_suffix="default"):
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if selection == 1:
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# 更新的正则表达式以匹配"第x章"和"第x部分"，考虑到可能的空格和其他文字
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begin_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:服务|项目|商务).*?要求|'
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?采购.*'
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)
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begin_page = 5
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end_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+'
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)
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local_output_suffix = "procurement"
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elif selection == 2:
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begin_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(磋商|谈判|评标|评定|评审)(方法|办法).*'
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)
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begin_page = 5
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end_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+'
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)
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local_output_suffix = "evaluation_method"
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elif selection == 3:
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begin_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(资格审查).*', re.MULTILINE
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)
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begin_page = 5
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end_pattern = re.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE
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)
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local_output_suffix = "qualification1"
|
||
elif selection ==4: #投标人须知前附表和正文
|
||
begin_page=1
|
||
begin_pattern = re.compile(
|
||
r'^(?:第[一二三四五六七八九十百千]+(?:章|部分)\s*(?:投标人须知|磋商须知|供应商须知)+|(?:一\s*、\s*)?(?:投标人须知|磋商须知|供应商须知)前附表)', re.MULTILINE
|
||
)
|
||
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 = "tobidders_notice"
|
||
else:
|
||
print("无效的选择")
|
||
return None
|
||
|
||
# 如果传入的 output_suffix 是 'default'，则使用本地生成的 output_suffix
|
||
if output_suffix == "default":
|
||
output_suffix = local_output_suffix
|
||
|
||
# 调用相应的处理函数
|
||
return process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
|
||
|
||
|
||
|
||
def truncate_pdf_multiple(input_path, output_folder):
|
||
truncate_files = []
|
||
for selection in range(1, 5):
|
||
files = truncate_pdf_main(input_path, output_folder, selection)
|
||
truncate_files.extend(files)
|
||
return truncate_files
|
||
|
||
|
||
# TODO:交通智能系统和招标(1)(1)文件有问题
|
||
if __name__ == "__main__":
|
||
input_path = "C:\\Users\\Administrator\\Desktop\\货物标\\zbfiles"
|
||
output_folder = "C:\\Users\\Administrator\\Desktop\\货物标\\output4"
|
||
# truncate_pdf_multiple(input_path,output_folder)
|
||
selection = 4 # 例如：1 - 商务技术服务要求, 2 - 评标办法, 3 - 资格审查后缀有qualification1和qualification2 4.投标人须知前附表
|
||
generated_files = truncate_pdf_main(input_path, output_folder, selection)
|