在Python中高效地比较两个文件中的行

def compare_files(file1, file2):
    with open(file1, 'r') as f1, open(file2, 'r') as f2:
        file1_lines = set(f1.readlines())
        file2_lines = set(f2.readlines())

        common_lines = file1_lines & file2_lines
        unique_lines_file1 = file1_lines - file2_lines
        unique_lines_file2 = file2_lines - file1_lines
        different_lines = file1_lines ^ file2_lines

        # 输出比较结果
        print("共同的行:")
        for line in common_lines:
            print(line.strip())

        print("文件1独有的行:")
        for line in unique_lines_file1:
            print(line.strip())

        print("文件2独有的行:")
        for line in unique_lines_file2:
            print(line.strip())

        print("不同的行:")
        for line in different_lines:
            print(line.strip())

# 调用函数进行比较
compare_files('file1.txt', 'file2.txt')