从两个不同的文件中读取行，如果找到匹配的，则打印行号[编辑]

def find_matching_lines(file1, file2):
    lines1 = set()
    matching_lines = []

    # 读取文件1的所有行并存储到集合中
    with open(file1, 'r') as f1:
        for line in f1:
            lines1.add(line.strip())

    # 逐行读取文件2，并检查是否在文件1中存在匹配的行
    with open(file2, 'r') as f2:
        for line_number, line in enumerate(f2, start=1):
            if line.strip() in lines1:
                matching_lines.append(line_number)

    return matching_lines

file1 = 'file1.txt'
file2 = 'file2.txt'
matching_lines = find_matching_lines(file1, file2)

if matching_lines:
    print("匹配的行号：")
    for line_number in matching_lines:
        print(line_number)
else:
    print("未找到匹配的行。")