下载电影字幕的时候，经常会出现一个字幕文件被分成cd1.srt、cd2.srt，但电影是一整块的尴尬情况。为了解决此问题，写了以下代码来合并多个这样的文件

读取字幕文件

def read_srt(path):
    content = ""
    with open(path) as f:
        content = f.read()
        return content

小测试

content = read_srt('1.srt')
print(content)

content = read_srt('2.srt')
print(content)

可以看到字幕的合并要做到两点，一个是内容要合并，一个是序号要对齐，因为2.srt中序号也是从1开始的。

字幕拆分

def get_sequences(content):
    sequences = content.split('\n\n')
    sequences = [sequence.split('\n') for sequence in sequences]
    # 去除每一句空值
    sequences = [list(filter(None, sequence)) for sequence in sequences]
    # 去除整体空值
    return list(filter(None, sequences))

小测试

sequences = get_sequences(content)
sequences

字幕修改

def change_sequences(sequences, start_index):
    for sequence in sequences:
        sequence[0] = str(start_index)
        start_index += 1

生成新字幕

def save_srt(names):
    new_content = []
    start_index = 1
    for name in names:
        content = read_srt(name)
        sequences = get_sequences(content)
        change_sequences(sequences, start_index)
        start_index = len(sequences) + 1
        new_content += sequences
    new_content = ['\n'.join(word) for word in new_content]
    new_content = '\n\n'.join(new_content)
    print(new_content)
    with open('result.srt', 'a') as f:
        f.write(new_content)

save_srt(['1.srt', '2.srt'])