Hmm, I must have some sort of other logic error which is preventing the detection of the format. Thanks for the information!

On Wed, Jun 29, 2016 at 10:24 AM, Peter Cock <p.j.a.cock@googlemail.com> wrote:
Have you invented your own file format, or are you using
an existing file format defined within Galaxy?

The Galaxy file formats with automatic detection are all
defined via Python classes which define a sniff method.

Peter

On Wed, Jun 29, 2016 at 3:15 PM, Katherine Beaulieu
<katherine.beaulieu014@gmail.com> wrote:
> Hi everyone,
> I am looking to auto-detect the file format of a file outputted by a python
> tool I have written. Does anyone have any idea how to do this? I have tried
> setting the format attribute to "auto" with no luck. Let me know if you
> would like to see my tool config file.
> Cheers,
> Katherine
>
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