| from pdfminer.high_level import extract_pages | |
| from pdfminer.layout import LTTextContainer | |
| def extract_text_from_pdf(filename,page_numbers=None,min_line_length=10): | |
| """从 PDF 文件中（按指定页码）提取文字""" | |
| paragraphs = [] | |
| buffer = '' | |
| full_text = '' | |
| # 提取全部文本 | |
| for i, page_layout in enumerate(extract_pages(filename)): | |
| # 如果指定了页码范围，跳过范围外的页 | |
| if page_numbers is not None and i not in page_numbers: | |
| continue | |
| for element in page_layout: | |
| if isinstance(element, LTTextContainer): | |
| full_text += element.get_text() + '\n' | |
| # 按空行分隔，将文本重新组织成段落 | |
| lines = full_text.split('\n') | |
| for text in lines: | |
| if len(text) >= min_line_length: | |
| buffer += (' '+text) if not text.endswith('-') else text.strip('-') | |
| elif buffer: | |
| paragraphs.append(buffer) | |
| buffer = '' | |
| if buffer: | |
| paragraphs.append(buffer) | |
| return paragraphs |