Problems with "Tarfile.close()"

Sat Dec 21 04:58:42 EST 2019

> 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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