In fact, sage/misc/log.py uses very old ipython features, which seem
to be long gone.
A modern way to say e.g. the whole command history to /tmp/xxx.log
would be to run

sage: %history -f /tmp/xxx.log
See
https://stackoverflow.com/questions/16858724/how-to-log-ipython-history-to-text-file/39413200
for more details

HTH
Dima

On Wed, Oct 30, 2019 at 6:19 PM Dima Pasechnik <[email protected]> wrote:
>
> This is a bug
> See https://trac.sagemath.org/ticket/28677
> Thanks for reporting it - it's a good example of code bitrot due to no
> tests... :-)
>
> On Wed, Oct 30, 2019 at 4:21 PM Max Alekseyev <[email protected]> wrote:
> >
> > Please advise on the following error.
> > Thanks,
> > Max
> >
> > ┌────────────────────────────────────────────────────────────────────┐
> > │ SageMath version 8.9, Release Date: 2019-09-29                     │
> > │ Using Python 2.7.15. Type "help()" for help.                       │
> > └────────────────────────────────────────────────────────────────────┘
> > sage: import sage.misc.log
> > sage: sage.misc.log.log_text()
> > ---------------------------------------------------------------------------
> > AttributeError                            Traceback (most recent call last)
> > <ipython-input-2-ace4f1da0972> in <module>()
> > ----> 1 sage.misc.log.log_text()
> >
> > /usr/local/SageMath.89/local/lib/python2.7/site-packages/sage/misc/log.pyc 
> > in __init__(self, dir, debug, viewer)
> >      97         self._dir = dir
> >      98         self._filename = os.path.join(dir, self._filename())
> > ---> 99         self._output = __IPYTHON__.output_hist
> >     100         self._input  = __IPYTHON__.input_hist_raw
> >     101         self._text = ''
> >
> > AttributeError: 'bool' object has no attribute 'output_hist'
> >
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