python连接文本文件_Python连接文本文件

这应该做

对于大文件：

filenames = ['file1.txt', 'file2.txt', ...]

with open('path/to/output/file', 'w') as outfile:

for fname in filenames:

with open(fname) as infile:

for line in infile:

outfile.write(line)

对于小文件：

filenames = ['file1.txt', 'file2.txt', ...]

with open('path/to/output/file', 'w') as outfile:

for fname in filenames:

with open(fname) as infile:

outfile.write(infile.read())

…和另一个有趣的，我想：

filenames = ['file1.txt', 'file2.txt', ...]

with open('path/to/output/file', 'w') as outfile:

for line in itertools.chain.from_iterable(itertools.imap(open, filnames)):

outfile.write(line)

遗憾的是，这最后一个方法留下了几个打开的文件描述符，GC应该照顾。我只是认为这很有趣