如何在 python 中使用 pptx、io 和 boto3 上传 .pptx？

Question

我使用了对this question 的回复，以便使用 boto3 和 io 从 s3 读取 .pptx（模板）。我更新了 .pptx，现在想用新名称将其上传回 s3。

我看到 boto3 有一个 method to upload a file-like object to s3: upload_fileobj()。

所以这就是我在尝试保存文件时正在做的事情：

import io
import boto3

from pptx import Presentation

s3 = boto3.client('s3')
s3_response_object = s3.get_object(Bucket='bucket', Key='file.pptx')
object_content = s3_response_object['Body'].read()

prs = Presentation(io.BytesIO(object_content))

# Do some stuff to the PowerPoint

out = io.BytesIO() # to have the presentation in binary format
with open(prs.save(out), "rb") as f:
    s3.upload_fileobj(f, 'BUCKET', 'KEY')

但我得到了错误

TypeError                                 Traceback (most recent call last)
<ipython-input-8-1956d13a7556> in <module>
----> 1 with open(prs.save(out), "rb") as f:
      2     s3.upload_fileobj(f, 'BUCKET', 'KEY')

TypeError: expected

 str, bytes or os.PathLike object, not NoneType

鉴于我从 Presentation 对象开始，我如何将其上传到 s3？

Answer 1

试试这个：

import io
import boto3

from pptx import Presentation

s3 = boto3.client('s3')
s3_response_object = s3.get_object(Bucket='bucket', Key='file.pptx')
object_content = s3_response_object['Body'].read()

prs = Presentation(io.BytesIO(object_content))

# Do some stuff to the PowerPoint

with io.BytesIO() as out:
    prs.save(out)
    out.seek(0)
    s3.upload_fileobj(out, 'BUCKET', 'KEY')