Problems with "Tarfile.close()"

[Barry]

> On 20 Dec 2019, at 15:31, Dr Rainer Woitok <rainer.woitok at gmail.com> wrote:
> 
> Greetings,
> 
> One of my Python scripts basically does the following:
> 
> source = tarfile.open(name=tar_archive  , mode='r|*')
> dest   = tarfile.open(fileobj=sys.stdout, mode='w|', format=fmt)
> 
> .
> .
> .
> 
> source.close()
> dest.close()
> 
> In an attempt to move my Python scripts  from Python 2.7 to Python 3.6 I
> ran into the problem  that under Python 3.6  the call to  "dest.close()"
> fails:
> 
> Traceback (most recent call last):
> File ".../tar_archive.copy", line 137, in <module>
> dest.close()
> File "/usr/lib64/python3.6/tarfile.py", line 1742, in close
> self.fileobj.close()
> File "/usr/lib64/python3.6/tarfile.py", line 467, in close
> self.fileobj.write(self.buf)
> TypeError: write() argument must be str, not bytes
> 
> What am I doing wrong?   By the way:  since on some hosts this script is
> running on  the transition from Python 2.7 to Python 3.x will not happen
> immediately, I need a solution which works with both versions.

Stdout on python 3 is a text stream. Tarfiles need a binary stream.

I searched for “python 3 binary stdout” and found this
 stack over flow question that has suggested fixes.

https://stackoverflow.com/questions/908331/how-to-write-binary-data-to-stdout-in-python-3#908440

Barry

> 
> Sincerely,
>  Rainer
> -- 
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>