如何使用python将文件分成几个文件

时间:2016-10-08 15:45:30

标签: python python-2.7 python-3.x

我有一个视频文件,我需要将划分分成几个大小 256KB 的小文件,并将所有文件名保存在文本文件中,然后我需要全部阅读小文件和将它们合并到原始文件中。

这可以在 python 中完成吗?

1 个答案:

答案 0 :(得分:2)

首先分裂:

input_file = open(input_filename, 'rb')
blocksize = 4096
chunksize = 1024 * 256
buf = None
chunk_num = 0
current_read = 0
output_filename = 'output-chunk-{:04d}'.format(chunk_num)
output_file = open(output_filename, 'wb')
while buf is None or len(buf) > 0:
    buf = input_file.read(blocksize)
    current_read += len(buf)
    output_file.write(buf)
    if chunksize <= current_read:
        output_file.close()
        current_read = 0
        chunk_num += 1
        output_filename = 'output-chunk-{:04d}'.format(chunk_num)
        output_file = open(output_filename, 'wb')
output_file.close()
input_file.close()

这可能会让你在那里;根据需要进行调整。

融合:

blocksize = 4096
chunk_num = 0
input_filename = 'output-chunk-{:04d}'.format(chunk_num)
output_filename = 'reconstructed.bin'
output_file = open(output_filename, 'wb')
while True:
    try:
        input_file = open(input_filename, 'rb')
    except IOError:
        break
    buf = None
    while buf is None or len(buf) > 0:
        buf = input_file.read(blocksize)
        output_file.write(buf)
    input_file.close()
    chunk_num += 1
    input_filename = 'output-chunk-{:04d}'.format(chunk_num)
output_file.close()