[英]S3 file to local using luigi raises UnicodeDecodeError
I am copying a pdf
file to local, using the following piece of code:我正在使用以下代码将pdf
文件复制到本地:
with self.input_target().open('r') as r:
with self.output_target().open('w') as w:
for line in r:
w.write(line)
Which is based in this question (kind of)这是基于这个问题(种类)
But when I execute that code I get the following:但是当我执行该代码时,我得到以下信息:
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe2 in position 11:
invalid continuation byte
I tried this other approach, without good results:我尝试了另一种方法,但没有很好的结果:
with self.input_target().open('r') as r, self.output_target().open('w') as w:
w.write(r.read())
What is the correct way of doing it?正确的做法是什么?
It seems that you're dealing with a binary file as if it was text - but it's not.似乎您正在处理一个二进制文件,就好像它是文本一样 - 但事实并非如此。 You probably need to do something like this:你可能需要做这样的事情:
with self.input().open('r') as i, self.output().open('w') as o:
o.write(i.read())
(not tested!) (未测试!)
Also, I think you may find this answer useful: Python writing binary files, bytes另外,我认为您可能会发现这个答案很有用: Python 编写二进制文件,字节
I ended using luigi.s3.S3Client
and the method get
which copies a binary file from/to the s3
.我结束了使用luigi.s3.S3Client
和从/向s3
复制二进制文件的方法get
。
Snippet of code:代码片段:
import luigi进口路易吉
class ATask(luigi.Task):
s3_path = luigi.Parameter()
local_path = luigi.Parameter()
...
def run(self):
client = luigi.s3.S3Client()
client.get(s3_path, local_path) ## This gets the file
...
I think that the underlying reason is that luigi
uses boto
for getting/putting files from/to the s3
.我认为根本原因是luigi
使用boto
从/向s3
获取/放置文件。 (As you can see in the source code) (如您在源代码中所见)
Another option would be to use the format kwarg luigi.format.Nop to Target to indicate that it is a binary file that is being read.另一种选择是使用格式 kwarg luigi.format.Nop 到 Target 来指示它是一个正在读取的二进制文件。
eg例如
def output(self):
return LocalTarget(target, format=luigi.format.Nop)
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