如何使更新的文本以粗体显示(Python)

我正在尝试制作一个Python脚本,该脚本遍历我们的一些项目文档(.pdf),并将状态/名称从R更新为F。原始文本是用Helvetica粗体书写的,但新文本没有粗体。我尝试了网上能找到的所有选择,但都无济于事。

请注意,我不是程序员,所以这是通过ChatGPT完成的,请不要解雇我:D

import os
import shutil
import fitz  # PyMuPDF
import re


def rename_and_copy_files():
    base_directory = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'original')
    updated_directory = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'updated')

    if not os.path.exists(updated_directory):
        os.makedirs(updated_directory)

    font_path = "Helvetica-Bold.ttf"
    if not os.path.isfile(font_path):
        print(f"Font file not found: {font_path}")
        return

    for filename in os.listdir(base_directory):
        if '_R_' in filename:
            new_filename = filename.replace('_R_', '_F_')
            src = os.path.join(base_directory, filename)
            dst = os.path.join(updated_directory, new_filename)

            print(f"Processing file: {filename}")

            if filename.endswith('.pdf'):
                update_pdf_text(src, dst, font_path)
            else:
                shutil.copy2(src, dst)

            print(f"Copied and renamed: {filename} to {new_filename}")


def update_pdf_text(src, dst, font_path):
    document = fitz.open(src)

    for page_num in range(len(document)):
        page = document[page_num]
        text_instances = page.search_for("_R_")

        for inst in text_instances:
            rect = fitz.Rect(inst)
            full_text, start_rect, end_rect = extract_full_name(page, rect)

            if not full_text:
                continue

            updated_text = full_text.replace('_R_', '_F_')

            page.draw_rect(fitz.Rect(start_rect.x0, start_rect.y0, end_rect.x1, end_rect.y1), color=(1, 1, 1),
                           fill=(1, 1, 1))

            new_y = start_rect.y0 + 10
            page.insert_text((start_rect.x0, new_y),
                             updated_text,
                             fontsize=10,
                             fontfile=font_path,
                             color=(0, 0, 0))

        single_r_instances = page.search_for(" R ")
        for inst in single_r_instances:
            rect = fitz.Rect(inst)

            page.draw_rect(rect, color=(1, 1, 1), fill=(1, 1, 1))

            new_y = rect.y0 + 10
            page.insert_text((rect.x0, new_y),
                             "F",
                             fontsize=10,
                             fontfile=font_path,
                             color=(0, 0, 0))

    document.save(dst, garbage=4, deflate=True)
    document.close()


def extract_full_name(page, rect):
    full_text = ""
    start_rect = rect
    end_rect = rect
    words = page.get_text("words")

    name_pattern = re.compile(r'[A-Za-z0-9_\-]+')

    for word in words:
        word_text = word[4]
        if rect.intersects(fitz.Rect(word[:4])) and name_pattern.match(word_text):
            start_rect = fitz.Rect(word[:4]) if fitz.Rect(word[:4]).x0 < start_rect.x0 else start_rect
            end_rect = fitz.Rect(word[:4]) if fitz.Rect(word[:4]).x1 > end_rect.x1 else end_rect
            full_text += word_text

    return full_text, start_rect, end_rect


if __name__ == "__main__":
    rename_and_copy_files()
    print("Process finished")

我尝试过使用不同版本的Helvetica bold(.otf和.ttf),也尝试过使用其他字体(Comic sans只是为了看看它是否会被选中,但没有)。没有字体文件,程序什么也不做,所以它必须意识到它的存在。。。只是不使用它。

我猜问题就在这一部分:

page.insert_text((rect.x0, new_y),
                             "F",
                             fontsize=10,
                             fontfile=font_path,
                             color=(0, 0, 0))

然而,我已经没有想法了。任何帮助都将不胜感激,谢谢!:)