[Mne_analysis] raw.append returning NoneType?

[Denis-Alexander Engemann]

Hi Per,

`.append` follows the semantics of Python lists in operating in place.
Invoking .append on a Raw object just appends the data:

raw1.append(raw2)


Then move on with raw1 which now also incluedes the data from raw2.


HTH,
Denis

2014-11-09 22:22 GMT+01:00 Per Arnold Lysne <lysne at unm.edu>:

>  ​Hello,
>
>
>      I am trying to append two raw files and then write their combination
> into a third file as follows (see
> https://mail.nmr.mgh.harvard.edu/pipermail//mne_analysis/2013-July/001569.html
> ):
>
>
>  import mne
>
>
>  raw1 = mne.io.raw(raw_file_name_1)
>
> raw2 = mne.io.raw(raw_file_name_2)
>
>
>  raw = raw1.append(raw2)
>
>
>  raw.save(combined_file_name)
>
>
>  But receive the following error at the 'save' step: AttributeError:
> 'NoneType' object has no attribute 'save'
>
>
>  This feels like something obvious, but I can't seem to find it. I am
> running the python code from the development tree, downloaded about a month
> ago. I think the relevant file is io/base.py, which is as follows:
>
>
>  -rw-rw-r-- 1 lysne lysne 75207 Oct 11 13:35 base.py
>
>
>  Thanks for everyone's help,
>
>
>  Per Lysne
>
> University of New Mexico
>
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