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 from flask_app.main.format_change import docx2pdf def clean_page_content(text, common_header): # 首先删除抬头公共部分 if common_header: # 确保有公共抬头才进行替换 for header_line in common_header.split('\n'): if header_line.strip(): # 只处理非空行 # 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 eg:89/129 这个代码分三步走可以把89/129完全删除 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 return text def extract_common_header(pdf_path): pdf_document = PdfReader(pdf_path) headers = [] total_pages = len(pdf_document.pages) # 确定要读取的页数和起始页 if total_pages == 2: pages_to_read = 2 start_page = 0 else: pages_to_read = 3 middle_page = total_pages // 2 start_page = max(0, middle_page - 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 common_headers = [] for lines in zip(*headers): # 在每一行中寻找公共单词 common_line = set(lines[0].split()).intersection(*[set(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): # 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 if file_path.lower().endswith(('.doc', '.docx')): return docx2pdf(file_path) return file_path def judge_file_exist(original_path, new_suffix): # 提取目录路径和原始文件名 directory = os.path.dirname(original_path) original_filename = os.path.basename(original_path) # 替换文件名中的旧后缀为新后缀 # 假设原始文件名格式为 '2-招标文件_qualification.pdf' # 需要替换 '_qualification' 部分为 '_qualification2' new_filename = original_filename.replace("_qualification1", f"_{new_suffix}") new_filename = new_filename.replace("_qualification2", f"_{new_suffix}") # 生成新的文件路径 new_file_path = os.path.join(directory, new_filename) # 检查新文件是否存在 if os.path.isfile(new_file_path): return new_file_path else: return None def merge_pdfs(paths, output_path): pdf_writer = PdfWriter() last_page_text = None # 用于存储上一个PDF的最后一页的文本 for path in paths: pdf_reader = PdfReader(path) pages = pdf_reader.pages start_index = 0 # 从第一页开始添加 # 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 if last_page_text is not None and len(pages) > 0: current_first_page_text = pages[0].extract_text() if pages[0].extract_text() else "" # 比较当前文件的第一页和上一个文件的最后一页的文本 if current_first_page_text == last_page_text: start_index = 1 # 如果相同，跳过当前文件的第一页 # 添加当前PDF的页面到写入器 for page in range(start_index, len(pages)): pdf_writer.add_page(pages[page]) # 更新last_page_text为当前PDF的最后一页的文本 if len(pages) > 0: last_page_text = pages[-1].extract_text() if pages[-1].extract_text() else "" # 写入合并后的PDF到文件 with open(output_path, 'wb') as out: pdf_writer.write(out) def merge_and_cleanup(output_pdf_path, suffix_to_merge): another_file_path = judge_file_exist(output_pdf_path, suffix_to_merge) if another_file_path: paths = [output_pdf_path, another_file_path] # 需要合并的 PDF 文件路径 merge_pdfs(paths, output_pdf_path) os.remove(another_file_path) print(f"文件 {another_file_path} 已删除。") def process_files(file_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix): pdf_path = convert_to_pdf(file_path) result = extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix) if result: if output_suffix == "tobidders_notice": return result # 返回包含两个路径的元组 elif output_suffix == "qualification1": merge_and_cleanup(result, "qualification3") return result return None def process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix): if not os.path.exists(output_folder): os.makedirs(output_folder) generated_files = [] # 判断输入是目录还是单个文件，并统一处理 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 result: if isinstance(result, tuple): generated_files.extend(result) else: generated_files.append(result) 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 result: if isinstance(result, tuple): generated_files.extend(result) else: generated_files.append(result) else: print("提供的路径既不是文件夹也不是PDF文件。") return generated_files def extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header, exclusion_pattern=None): 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) if exclusion_pattern and re.search(exclusion_pattern, cleaned_text): continue 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(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix): try: common_header = extract_common_header(pdf_path) pdf_document = PdfReader(pdf_path) exclusion_pattern = None if output_suffix == "tobidders_notice": start_page, mid_page, end_page = extract_pages_tobidders_notice(pdf_document, begin_pattern, end_pattern, begin_page, common_header) if start_page is None or mid_page is None or end_page is None: 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。") return extract_pages_twice_tobidders_notice(pdf_path, output_folder, output_suffix, common_header) path1 = save_extracted_pages(pdf_document, start_page, mid_page - 1, pdf_path, output_folder, "tobidders_notice_part1") path2 = save_extracted_pages(pdf_document, mid_page, end_page, pdf_path, output_folder, "tobidders_notice_part2") return path1, path2 else: # 原有的处理逻辑保持不变 if output_suffix == "qualification1": 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') start_page, end_page = extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header, exclusion_pattern) if start_page is None or end_page is None: 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。") return extract_pages_twice(pdf_path, output_folder, output_suffix, common_header) elif output_suffix == "qualification1": truncate_pdf_main(pdf_path, output_folder, 2, "qualification3") 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 None def extract_pages_tobidders_notice(pdf_document, begin_pattern, end_pattern, begin_page, common_header): start_page = None mid_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) 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 mid_page is None and re.search( r'^\s*[（(]?\s*[一1]\s*[)）]?\s*[、.]*\s*(说\s*明|总\s*则)', cleaned_text, re.MULTILINE): mid_page = i if start_page is not None and mid_page is not None and re.search(end_pattern, cleaned_text) and i > mid_page: end_page = i break return start_page, mid_page, end_page def extract_pages_twice_tobidders_notice(): print("ha") def get_patterns_for_procurement(): begin_pattern = re.compile( 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|' r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:采购|技术标准).*|' r'^[一二三四五六七八九十百千]+、\s*采购清单', 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) return begin_pattern, end_pattern def get_patterns_for_evaluation_method(): begin_pattern = re.compile( 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) 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) return begin_pattern, end_pattern def get_patterns_for_qualification(): # # 原始匹配逻辑 # begin_pattern_original = re.compile( # r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(资格审查).*', re.MULTILINE) # end_pattern_original = re.compile( # r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE) # 新匹配逻辑 begin_pattern_new = re.compile( r'^资格性检查', re.MULTILINE) end_pattern_new = re.compile( 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) return begin_pattern_new, end_pattern_new def extract_pages_twice(pdf_path, output_folder, output_suffix, common_header): 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') pdf_document = PdfReader(pdf_path) patterns = None if output_suffix == "procurement": patterns = [get_patterns_for_procurement()] elif output_suffix == "evaluation_method" or output_suffix=="qualification2" or output_suffix=="qualification3": patterns = [get_patterns_for_evaluation_method()] elif output_suffix == "qualification1": patterns = [get_patterns_for_qualification()] # This now returns a tuple of pattern pairs # Try each set of patterns until a valid range is found for pattern_pair in patterns: start_page, end_page = extract_pages_generic(pdf_document, pattern_pair[0], pattern_pair[1], 5, common_header, exclusion_pattern) if start_page is not None and end_page is not None: break if start_page is None or end_page is None: if output_suffix == "qualification1": print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！") print("third:尝试提取评分办法章节...") temp=truncate_pdf_main(pdf_path,output_folder,2,"qualification2") if len(temp) > 0: return temp[0] else: return None else: print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！") return "" return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix) def save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix): base_file_name = os.path.splitext(os.path.basename(pdf_path))[0] output_pdf_path = os.path.join(output_folder, f"{base_file_name}_{output_suffix}.pdf") 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 def truncate_pdf_main(input_path, output_folder, selection, output_suffix="default"): if selection == 1: # 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 begin_pattern = re.compile( 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|' r'^第[一二三四五六七八九十百千]+(?:章|部分).*?采购.*' ) begin_page = 5 end_pattern = re.compile( r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+' ) local_output_suffix = "procurement" elif selection == 2: begin_pattern = re.compile( 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).*' ) begin_page = 5 end_pattern = re.compile( r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+' ) local_output_suffix = "evaluation_method" elif selection == 3: begin_pattern = re.compile( r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(资格审查).*', re.MULTILINE ) begin_page = 5 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 = "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\\磋商文件(1).pdf" 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)