scratch_21.py

def copy_unique_lines(file1_path, file2_path):
    with open(file1_path, 'r', encoding="utf-8") as file1:
        with open(file2_path, 'r', encoding="utf-8") as file2:
            # 读取第二个文件的所有行，去除每行末尾的换行符
            file2_lines = {line.strip() for line in file2}

        # 逐行读取第一个文件，去除每行末尾的换行符
        unique_lines = [line.strip() for line in file1 if line.strip() not in file2_lines]

    # 一次性打开第二个文件以追加模式，写入所有不重复的行
    with open(file2_path, 'a', encoding="utf-8") as file2:
        for line in unique_lines:
            file2.write(line + '\n')

# 调用函数，传入两个文件的路径
copy_unique_lines(r'T:\桌面\celestial_artifacts-1.18\celestial_artifacts-1.18\src\main\resources\assets\celestial_artifacts\lang\1.json',
                   r'T:\桌面\celestial_artifacts-1.18\celestial_artifacts-1.18\src\main\resources\assets\celestial_artifacts\lang\zh_cn.json')