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[Louis Taylor <kragniz@xxxxxxxxx>]

This quite badly breaks the client's backwards compatibility. Are there
any particular reasons you'd like to see this change?

** Project changed: glance => python-glanceclient

** Changed in: python-glanceclient
       Status: New => Opinion

** Changed in: python-glanceclient
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1405707

Title:
  do we really need the function that image-download API will print the
  image downloaded to stdout by default

Status in Python client library for Glance:
  Opinion

Bug description:
  
  API image-download will download the image and print it to stdout by default, if we don't add ''--file" option. 
  Is that used for redirect the output to a new file? Could we improve the default action of 'image-download'?

  From the help doc, we can see:

  # glance help image-download
  usage: glance image-download [--file <FILE>] [--progress] <IMAGE>

  Download a specific image.

  Positional arguments:
    <IMAGE>        Name or ID of image to download.

  Optional arguments:
    --file <FILE>  Local file to save downloaded image data to. If this is not
                   specified the image data will be written to stdout.
    --progress     Show download progress bar.

  
  output the image to stdout:

  #glance image-download 535c71a3-8ad3-442d-ac46-16b0ae1a5e53 
  `?$X?
 :'SS?
:'S

  ..]..irros-rootfs0.j....q瓶


                                        :'SAAAAA	A
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